Haaland v. Brackeen ( 2023 )


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  • (Slip Opinion)              OCTOBER TERM, 2022                                       1
    Syllabus
    NOTE: Where it is feasible, a syllabus (headnote) will be released, as is
    being done in connection with this case, at the time the opinion is issued.
    The syllabus constitutes no part of the opinion of the Court but has been
    prepared by the Reporter of Decisions for the convenience of the reader.
    See United States v. Detroit Timber & Lumber Co., 
    200 U. S. 321
    , 337.
    SUPREME COURT OF THE UNITED STATES
    Syllabus
    HAALAND, SECRETARY OF THE INTERIOR, ET AL. v.
    BRACKEEN ET AL.
    CERTIORARI TO THE UNITED STATES COURT OF APPEALS FOR
    THE FIFTH CIRCUIT
    No. 21–376.      Argued November 9, 2022—Decided June 15, 2023*
    This case arises from three separate child custody proceedings governed
    by the Indian Child Welfare Act (ICWA), a federal statute that aims to
    keep Indian children connected to Indian families. ICWA governs
    state court adoption and foster care proceedings involving Indian chil-
    dren. Among other things, the Act requires placement of an Indian
    child according to the Act’s hierarchical preferences, unless the state
    court finds “good cause” to depart from them. 
    25 U. S. C. §§1915
    (a),
    (b). Under those preferences, Indian families or institutions from any
    tribe (not just the tribe to which the child has a tie) outrank unrelated
    non-Indians or non-Indian institutions. Further, the child’s tribe may
    pass a resolution altering the prioritization order. §1915(c). The pref-
    erences of the Indian child or her parent generally cannot trump those
    set by statute or tribal resolution.
    In involuntary proceedings, the Act mandates that the Indian child’s
    parent or custodian and tribe be given notice of any custody proceed-
    ings, as well as the right to intervene. §§1912(a), (b), (c). Section
    1912(d) requires a party seeking to terminate parental rights or to re-
    move an Indian child from an unsafe environment to “satisfy the court
    that active efforts have been made to provide remedial services and
    rehabilitative programs designed to prevent breakup of the Indian
    family,” and a court cannot order relief unless the party demonstrates,
    by a heightened burden of proof and expert testimony, that the child is
    ——————
    * Together with No. 21–377, Cherokee Nation et al. v. Brackeen et al.,
    No. 21–378, Texas v. Haaland, Secretary of the Interior, et al., and No.
    21–380, Brackeen et al. v. Haaland, Secretary of the Interior, et al., also
    on certiorari to the same court.
    2                        HAALAND v. BRACKEEN
    Syllabus
    likely to suffer “serious emotional or physical damage” if the parent or
    Indian custodian retains custody. §§1912(d), (e). Even for voluntary
    proceedings, a biological parent who gives up an Indian child cannot
    necessarily choose the child’s foster or adoptive parents. The child’s
    tribe has “a right to intervene at any point in [a] proceeding” to place
    a child in foster care or terminate parental rights, as well as a right to
    collaterally attack the state court’s custody decree. §§1911(c), 1914.
    The tribe thus can sometimes enforce ICWA’s placement preferences
    against the wishes of one or both biological parents, even after the
    child is living with a new family. Finally, the States must keep certain
    records related to child placements, see §1915(e), and transmit to the
    Secretary of the Interior all final adoption decrees and other specified
    information, see §1951(a).
    Petitioners—a birth mother, foster and adoptive parents, and the
    State of Texas—filed this suit in federal court against the United
    States and other federal parties. Several Indian Tribes intervened to
    defend the law alongside the federal parties. Petitioners challenged
    ICWA as unconstitutional on multiple grounds. They asserted that
    Congress lacks authority to enact ICWA and that several of ICWA’s
    requirements violate the anticommandeering principle of the Tenth
    Amendment. They argued that ICWA employs racial classifications
    that unlawfully hinder non-Indian families from fostering or adopting
    Indian children. And they challenged §1915(c)—the provision that al-
    lows tribes to alter the prioritization order—on the ground that it vio-
    lates the nondelegation doctrine.
    The District Court granted petitioners’ motion for summary judg-
    ment on their constitutional claims, and the en banc Fifth Circuit af-
    firmed in part and reversed in part. The Fifth Circuit concluded that
    ICWA does not exceed Congress’s legislative power, that §1915(c) does
    not violate the nondelegation doctrine, and that some of ICWA’s place-
    ment preferences satisfy the guarantee of equal protection. The Fifth
    Circuit was evenly divided as to whether ICWA’s other preferences—
    those prioritizing “other Indian families” and “Indian foster home[s]”
    over non-Indian families—unconstitutionally discriminate on the ba-
    sis of race, and thus affirmed the District Court’s ruling that these
    preferences are unconstitutional. As to petitioners’ Tenth Amendment
    arguments, the Fifth Circuit held that §1912(d)’s “active efforts” re-
    quirement, §1912(e)’s and §1912(f)’s expert witness requirements, and
    §1915(e)’s recordkeeping requirement unconstitutionally commandeer
    the States. And because it divided evenly with respect to other chal-
    lenged provisions (§1912(a)’s notice requirement, §1915(a) and
    §1915(b)’s placement preferences, and §1951(a)’s recordkeeping re-
    quirement), the Fifth Circuit affirmed the District Court’s holding that
    these requirements violate the Tenth Amendment.
    Cite as: 
    599 U. S. ____
     (2023)                      3
    Syllabus
    Held:
    1. The Court declines to disturb the Fifth Circuit’s conclusion
    that ICWA is consistent with Congress’s Article I authority. Pp. 10–
    17.
    (a) The Court has characterized Congress’s power to legislate with
    respect to the Indian tribes as “plenary and exclusive,” United States
    v. Lara, 
    541 U. S. 193
    , 200, superseding both tribal and state authority,
    Santa Clara Pueblo v. Martinez, 
    436 U. S. 49
    , 56. The Court has traced
    that power to multiple sources. First, the Indian Commerce Clause
    authorizes Congress “[t]o regulate Commerce . . . with the Indian
    Tribes,” U. S. Const., Art. I, §8, cl. 3, and the Court has interpreted the
    Indian Commerce Clause to reach not only trade, but also certain “In-
    dian affairs,” Cotton Petroleum Corp. v. New Mexico, 
    490 U. S. 163
    ,
    192. The Treaty Clause provides a second source of power. The treaty
    power “does not literally authorize Congress to act legislatively,” since
    it is housed in Article II, but “treaties made pursuant to that power
    can authorize Congress to deal with ‘matters’ with which otherwise
    ‘Congress could not deal.’ ” Lara, 
    541 U. S., at 201
    . Also, principles
    inherent in the Constitution’s structure may empower Congress to act
    in the field of Indian affairs. See Morton v. Mancari, 
    417 U. S. 535
    ,
    551–552. Finally, the “trust relationship between the United States
    and the Indian people” informs the exercise of legislative power.
    United States v. Mitchell, 
    463 U. S. 206
    , 225–226. In sum, Congress’s
    power to legislate with respect to Indians is well established and broad,
    but it is not unbounded. It is plenary within its sphere, but even a
    sizeable sphere has borders. Pp. 10–14.
    (b) Petitioners contend that ICWA impermissibly treads on the
    States’ traditional authority over family law. But when Congress val-
    idly legislates pursuant to its Article I powers, the Court “has not hes-
    itated” to find conflicting state family law preempted, “[n]otwithstand-
    ing the limited application of federal law in the field of domestic
    relations generally.” Ridgway v. Ridgway, 
    454 U. S. 46
    , 54. And the
    Court has recognized Congress’s power to displace the jurisdiction of
    state courts in adoption proceedings involving Indian children. Fisher
    v. District Court of Sixteenth Judicial Dist. of Mont., 
    424 U. S. 382
    , 390
    (per curiam). Pp. 14–15.
    (c) Petitioners contend that no source of congressional authority
    authorizes Congress to regulate custody proceedings for Indian chil-
    dren. They suggest that the Indian Commerce Clause, for example,
    authorizes Congress to legislate only with respect to Indian tribes as
    government entities, not Indians as individuals. But this Court’s hold-
    ing more than a century ago that “commerce with the Indian tribes,
    means commerce with the individuals composing those tribes,” United
    States v. Holliday, 
    3 Wall. 407
    , 417, renders that argument a dead end.
    4                        HAALAND v. BRACKEEN
    Syllabus
    Petitioners also assert that ICWA takes the “commerce” out of the In-
    dian Commerce Clause because “children are not commodities that can
    be traded.” Brief for Individual Petitioners 16. This point, while rhe-
    torically powerful, ignores the Court’s precedent interpreting the In-
    dian Commerce Clause to encompass not only trade but also other In-
    dian affairs. Petitioners next argue that ICWA cannot be authorized
    by principles inherent in the Constitution’s structure because those
    principles “extend, at most, to matters of war and peace.” Brief for
    Petitioner Texas 28. Again, petitioners make no argument that takes
    this Court’s cases on their own terms. The Court has referred gener-
    ally to the powers “necessarily inherent in any Federal Government”
    and has offered non-military examples, such as “creating departments
    of Indian affairs.” Lara, 
    541 U. S., at
    201–202. Petitioners next ob-
    serve that ICWA does not implement a federal treaty, but Congress
    did not purport to enact ICWA pursuant to its treaty power and the
    Fifth Circuit did not uphold ICWA on that rationale. Finally, petition-
    ers turn to criticizing this Court’s precedent as inconsistent with the
    Constitution’s original meaning, but they neither ask the Court to
    overrule the precedent they criticize nor try to reconcile their approach
    with it. If there are arguments that ICWA exceeds Congress’s author-
    ity as precedent stands today, petitioners do not make them here. Pp.
    15–17.
    2. Petitioners’ anticommandeering challenges, which address three
    categories of ICWA provisions, are rejected. Pp. 18–29.
    (a) First, petitioners challenge certain requirements that apply in
    involuntary proceedings to place a child in foster care or terminate pa-
    rental rights, focusing on the requirement that an initiating party
    demonstrate “active efforts” to keep the Indian family together.
    §1912(d). Petitioners contend this subsection directs state and local
    agencies to provide extensive services to the parents of Indian chil-
    dren, even though it is well established that the Tenth Amendment
    bars Congress from “command[ing] the States’ officers, or those of their
    political subdivisions, to administer or enforce a federal regulatory
    program.” Printz v. United States, 
    521 U. S. 898
    , 935. To succeed,
    petitioners must show that §1912(d) harnesses a State’s legislative or
    executive authority. But the provision applies to “any party” who ini-
    tiates an involuntary proceeding, thus sweeping in private individuals
    and agencies as well as government entities. A demand that either
    public or private actors can satisfy is unlikely to require the use of sov-
    ereign power. Murphy v. National Collegiate Athletic Assn., 
    584 U. S. ___
    , ___–___. Petitioners nonetheless insist that States institute the
    vast majority of involuntary proceedings. But examples of private
    suits are not hard to find. And while petitioners treat “active efforts”
    as synonymous with “government programs,” state courts have applied
    Cite as: 
    599 U. S. ____
     (2023)                      5
    Syllabus
    the “active efforts” requirement in private suits too. That is consistent
    with ICWA’s findings, which describe the role that both public and pri-
    vate actors played in the unjust separation of Indian children from
    their families and tribes. §1901. Given all this, it is implausible that
    §1912(d) is directed primarily, much less exclusively, at the States.
    Legislation that applies “evenhandedly” to state and private actors
    does not typically implicate the Tenth Amendment. Murphy, 584
    U. S., at ___. Petitioners would distinguish the Court’s precedents so
    holding on the grounds that those cases addressed laws regulating a
    State’s commercial activity, while ICWA regulates a State’s “core sov-
    ereign function of protecting the health and safety of children within
    its borders.” Brief for Petitioner Texas 66. This argument is presum-
    ably directed at situations in which only the State can rescue a child
    from neglectful parents. But the State is not necessarily the only op-
    tion for rescue, and §1912(d) applies to other types of proceedings too.
    Petitioners do not distinguish between these varied situations, much
    less isolate a domain in which only the State can act. If there is a core
    of involuntary proceedings committed exclusively to the sovereign,
    Texas neither identifies its contours nor explains what §1912(d) re-
    quires of a State in that context. Petitioners have therefore failed to
    show that the “active efforts” requirement commands the States to de-
    ploy their executive or legislative power to implement federal Indian
    policy. And as for petitioners’ challenges to other provisions of §1912—
    the notice requirement, expert witness requirement, and evidentiary
    standards—the Court doubts that requirements placed on a State as
    litigant implicate the Tenth Amendment. But regardless, these provi-
    sions, like §1912(d), apply to both private and state actors, so they too
    pose no anticommandeering problem. Pp. 18–23.
    (b) Petitioners next challenge ICWA’s placement preferences, set
    forth in §1915. Petitioners assert that this provision orders state agen-
    cies to perform a “diligent search” for placements that satisfy ICWA’s
    hierarchy. Just as Congress cannot compel state officials to search da-
    tabases to determine the lawfulness of gun sales, Printz, 
    521 U. S., at
    902–904, petitioners argue, Congress cannot compel state officials to
    search for a federally preferred placement. As with §1912, petitioners
    have not shown that the “diligent search” requirement, which applies
    to both private and public parties, demands the use of state sovereign
    authority. Moreover, §1915 does not require anyone, much less the
    States, to search for alternative placements; instead, the burden is on
    the tribe or other objecting party to produce a higher-ranked place-
    ment. Adoptive Couple v. Baby Girl, 
    570 U. S. 637
    , 654. So, as it
    stands, petitioners assert an anticommandeering challenge to a provi-
    sion that does not command state agencies to do anything.
    State courts are a different matter. ICWA indisputably requires
    6                        HAALAND v. BRACKEEN
    Syllabus
    them to apply the placement preferences in making custody determi-
    nations. §§1915(a), (b). But Congress can require state courts, unlike
    state executives and legislatures, to enforce federal law. See New York
    v. United States, 
    505 U. S. 144
    , 178–179. Petitioners draw a distinc-
    tion between requiring state courts to entertain federal causes of ac-
    tion and requiring them to apply federal law to state causes of action,
    but this argument runs counter to the Supremacy Clause. When Con-
    gress enacts a valid statute, “state law is naturally preempted to the
    extent of any conflict with a federal statute.” Crosby v. National For-
    eign Trade Council, 
    530 U. S. 363
    , 372. That a federal law modifies a
    state law cause of action does not limit its preemptive effect. See, e.g.,
    Hillman v. Maretta, 
    569 U. S. 483
    , 493–494 (federal law establishing
    order of precedence for life insurance beneficiaries preempted state
    law). Pp. 23–25.
    (c) Finally, petitioners insist that Congress cannot force state
    courts to maintain or transmit records of custody proceedings involv-
    ing Indian children. But the anticommandeering doctrine applies “dis-
    tinctively” to a state court’s adjudicative responsibilities. Printz, 
    521 U. S., at 907
    . The Constitution allows Congress to require “state
    judges to enforce federal prescriptions, insofar as those prescriptions
    relat[e] to matters appropriate for the judicial power.” 
    Ibid.
     (emphasis
    deleted). In Printz, the Court indicated that this principle may extend
    to tasks that are “ancillary” to a “quintessentially adjudicative task”—
    such as “recording, registering, and certifying” documents. 
    Id., at 908, n. 2
    . Printz described numerous historical examples of Congress im-
    posing recordkeeping and reporting requirements on state courts.
    These early congressional enactments demonstrate that the Constitu-
    tion does not prohibit the Federal Government from imposing adjudi-
    cative tasks on state courts. Bowsher v. Synar, 
    478 U. S. 714
    , 723. The
    Court now confirms what Printz suggested: Congress may impose an-
    cillary recordkeeping requirements related to state-court proceedings
    without violating the Tenth Amendment. Here, ICWA’s recordkeeping
    requirements are comparable to the historical examples. The duties
    ICWA imposes are “ancillary” to the state court’s obligation to conduct
    child custody proceedings in compliance with ICWA. Printz, 
    521 U. S., at 908, n. 2
    . Pp. 25–29.
    3. The Court does not reach the merits of petitioners’ two additional
    claims—an equal protection challenge to ICWA’s placement prefer-
    ences and a nondelegation challenge to §1915(c), the provision allow-
    ing tribes to alter the placement preferences—because no party before
    the Court has standing to raise them. Pp. 29–34.
    (a) The individual petitioners argue that ICWA’s hierarchy of
    preferences injures them by placing them on unequal footing with In-
    Cite as: 
    599 U. S. ____
     (2023)                      7
    Syllabus
    dian parents who seek to adopt or foster an Indian child. But the in-
    dividual petitioners have not shown that this injury is “likely” to be
    “redressed by judicial relief.” TransUnion LLC v. Ramirez, 
    594 U. S. ___
    , ___. They seek an injunction preventing the federal parties from
    enforcing ICWA and a declaratory judgment that the challenged pro-
    visions are unconstitutional. Yet enjoining the federal parties would
    not remedy the alleged injury, because state courts apply the place-
    ment preferences, and state agencies carry out the court-ordered place-
    ments. §§1903(1), 1915(a), (b). The state officials who implement
    ICWA are “not parties to the suit, and there is no reason they should
    be obliged to honor an incidental legal determination the suit pro-
    duced.” Lujan v. Defenders of Wildlife, 
    504 U. S. 555
    , 569 (plurality
    opinion). Petitioners’ request for a declaratory judgment suffers from
    the same flaw. The individual petitioners insist that state courts are
    likely to defer to a federal court’s interpretation of federal law, thus
    giving rise to a substantial likelihood that a favorable judgment will
    redress their injury. But such a theory would mean redressability
    would be satisfied whenever a decision might persuade actors who are
    not before the court—contrary to Article III’s strict prohibition on “is-
    suing advisory opinions.” Carney v. Adams, 
    592 U. S. ___
    , ___. It is a
    federal court’s judgment, not its opinion, that remedies an injury. The
    individual petitioners can hope for nothing more than an opinion, so
    they cannot satisfy Article III. Pp. 29–32.
    (b) Texas has no equal protection rights of its own, South Carolina
    v. Katzenbach, 
    383 U. S. 301
    , 323, and it cannot assert equal protection
    claims on behalf of its citizens against the Federal Government, Alfred
    L. Snapp & Son, Inc. v. Puerto Rico ex rel. Barez, 
    458 U. S. 592
    , 610,
    n. 16. The State’s creative arguments for why it has standing despite
    these settled rules also fail. Texas’s argument that ICWA requires it
    to “break its promise to its citizens that it will be colorblind in child-
    custody proceedings,” Reply Brief for Texas 15, is not the kind of “con-
    crete” and “particularized” “invasion of a legally protected interest”
    necessary to demonstrate an injury in fact, Lujan, 
    504 U. S., at 560
    .
    Texas also claims a direct pocketbook injury associated with the costs
    of keeping records, providing notice in involuntary proceedings, and
    producing expert testimony before moving a child to foster care or ter-
    minating parental rights. But these alleged costs are not “fairly trace-
    able” to the placement preferences, which “operate independently” of
    the provisions Texas identifies. California v. Texas, 
    593 U. S. ___
    , ___.
    Texas would continue to incur the complained-of costs even if it were
    relieved of the duty to apply the placement preferences. Because Texas
    is not injured by the placement preferences, neither would it be injured
    by a tribal resolution that altered those preferences pursuant to
    §1915(c). Texas therefore does not have standing to bring either its
    8                      HAALAND v. BRACKEEN
    Syllabus
    equal protection or its nondelegation claims. And although the indi-
    vidual petitioners join Texas’s nondelegation challenge to §1915(c),
    they raise no independent arguments about why they would have
    standing to bring this claim. Pp. 32–34.
    
    994 F. 3d 249
    , affirmed in part, reversed in part, vacated and remanded
    in part.
    BARRETT, J., delivered the opinion of the Court, in which ROBERTS,
    C. J., and SOTOMAYOR, KAGAN, GORSUCH, KAVANAUGH, and JACKSON, JJ.,
    joined. GORSUCH, J., filed a concurring opinion, in which SOTOMAYOR and
    JACKSON, JJ., joined as to Parts I and III. KAVANAUGH, J., filed a concur-
    ring opinion. THOMAS, J., and ALITO, J., filed dissenting opinions.
    Cite as: 
    599 U. S. ____
     (2023)                              1
    Opinion of the Court
    NOTICE: This opinion is subject to formal revision before publication in the
    United States Reports. Readers are requested to notify the Reporter of
    Decisions, Supreme Court of the United States, Washington, D. C. 20543,
    pio@supremecourt.gov, of any typographical or other formal errors.
    SUPREME COURT OF THE UNITED STATES
    _________________
    Nos. 21–376, 21–377, 21–378 and 21–380
    _________________
    DEB HAALAND, SECRETARY OF THE INTERIOR,
    ET AL., PETITIONERS
    21–376                 v.
    CHAD EVERET BRACKEEN, ET AL.
    CHEROKEE NATION, ET AL., PETITIONERS
    21–377              v.
    CHAD EVERET BRACKEEN, ET AL.
    TEXAS, PETITIONER
    21–378                  v.
    DEB HAALAND, SECRETARY OF THE
    INTERIOR, ET AL.
    CHAD EVERET BRACKEEN, ET AL., PETITIONERS
    21–380               v.
    DEB HAALAND, SECRETARY OF THE
    INTERIOR, ET AL.
    ON WRITS OF CERTIORARI TO THE UNITED STATES COURT OF
    APPEALS FOR THE FIFTH CIRCUIT
    [June 15, 2023]
    JUSTICE BARRETT delivered the opinion of the Court.
    This case is about children who are among the most vul-
    nerable: those in the child welfare system. In the usual
    course, state courts apply state law when placing children
    2                  HAALAND v. BRACKEEN
    Opinion of the Court
    in foster or adoptive homes. But when the child is an In-
    dian, a federal statute—the Indian Child Welfare Act—gov-
    erns. Among other things, this law requires a state court
    to place an Indian child with an Indian caretaker, if one is
    available. That is so even if the child is already living with
    a non-Indian family and the state court thinks it in the
    child’s best interest to stay there.
    Before us, a birth mother, foster and adoptive parents,
    and the State of Texas challenge the Act on multiple consti-
    tutional grounds. They argue that it exceeds federal au-
    thority, infringes state sovereignty, and discriminates on
    the basis of race. The United States, joined by several In-
    dian Tribes, defends the law. The issues are complicated—
    so for the details, read on. But the bottom line is that we
    reject all of petitioners’ challenges to the statute, some on
    the merits and others for lack of standing.
    I
    A
    In 1978, Congress enacted the Indian Child Welfare Act
    (ICWA) out of concern that “an alarmingly high percentage
    of Indian families are broken up by the removal, often un-
    warranted, of their children from them by nontribal public
    and private agencies.” 
    92 Stat. 3069
    , 
    25 U. S. C. §1901
    (4).
    Congress found that many of these children were being
    “placed in non-Indian foster and adoptive homes and insti-
    tutions,” and that the States had contributed to the problem
    by “fail[ing] to recognize the essential tribal relations of In-
    dian people and the cultural and social standards prevail-
    ing in Indian communities and families.” §§1901(4), (5).
    This harmed not only Indian parents and children, but also
    Indian tribes. As Congress put it, “there is no resource that
    is more vital to the continued existence and integrity of In-
    dian tribes than their children.” §1901(3). Testifying be-
    fore Congress, the Tribal Chief of the Mississippi Band of
    Choctaw Indians was blunter: “Culturally, the chances of
    Cite as: 
    599 U. S. ____
     (2023)            3
    Opinion of the Court
    Indian survival are significantly reduced if our children, the
    only real means for the transmission of the tribal heritage,
    are to be raised in non-Indian homes and denied exposure
    to the ways of their People.” Hearings on S. 1214 before the
    Subcommittee on Indian Affairs and Public Lands of the
    House Committee on Interior and Insular Affairs, 95th
    Cong., 2d Sess., 193 (1978).
    The Act thus aims to keep Indian children connected to
    Indian families. “Indian child” is defined broadly to include
    not only a child who is “a member of an Indian tribe,” but
    also one who is “eligible for membership in an Indian tribe
    and is the biological child of a member of an Indian tribe.”
    §1903(4). If the Indian child lives on a reservation, ICWA
    grants the tribal court exclusive jurisdiction over all child
    custody proceedings, including adoptions and foster care
    proceedings. §1911(a). For other Indian children, state and
    tribal courts exercise concurrent jurisdiction, although the
    state court is sometimes required to transfer the case to
    tribal court. §1911(b). When a state court adjudicates the
    proceeding, ICWA governs from start to finish. That is true
    regardless of whether the proceeding is “involuntary” (one
    to which the parents do not consent) or “voluntary” (one to
    which they do).
    Involuntary proceedings are subject to especially strin-
    gent safeguards. See 
    25 CFR §23.104
     (2022); 
    81 Fed. Reg. 38832
    –38836 (2016). Any party who initiates an “involun-
    tary proceeding” in state court to place an Indian child in
    foster care or terminate parental rights must “notify the
    parent or Indian custodian and the Indian child’s tribe.”
    §1912(a). The parent or custodian and tribe have the right
    to intervene in the proceedings; the right to request extra
    time to prepare for the proceedings; the right to “examine
    all reports or other documents filed with the court”; and, for
    indigent parents or custodians, the right to court-appointed
    counsel. §§1912(a), (b), (c). The party attempting to termi-
    4                  HAALAND v. BRACKEEN
    Opinion of the Court
    nate parental rights or remove an Indian child from an un-
    safe environment must first “satisfy the court that active
    efforts have been made to provide remedial services and re-
    habilitative programs designed to prevent the breakup of
    the Indian family and that these efforts have proved unsuc-
    cessful.” §1912(d). Even then, the court cannot order a fos-
    ter care placement unless it finds “by clear and convincing
    evidence, including testimony of qualified expert witnesses,
    that the continued custody of the child by the parent or In-
    dian custodian is likely to result in serious emotional or
    physical damage to the child.” §1912(e). To terminate pa-
    rental rights, the court must make the same finding “be-
    yond a reasonable doubt.” §1912(f ).
    The Act applies to voluntary proceedings too. Relinquish-
    ing a child temporarily (to foster care) or permanently (to
    adoption) is a grave act, and a state court must ensure that
    a consenting parent or custodian knows and understands
    “the terms and consequences.” §1913(a). Notably, a biolog-
    ical parent who voluntarily gives up an Indian child cannot
    necessarily choose the child’s foster or adoptive parents.
    The child’s tribe has “a right to intervene at any point in [a]
    proceeding” to place a child in foster care or terminate pa-
    rental rights, as well as a right to collaterally attack the
    state court’s decree. §§1911(c), 1914. As a result, the tribe
    can sometimes enforce ICWA’s placement preferences
    against the wishes of one or both biological parents, even
    after the child is living with a new family. See Mississippi
    Band of Choctaw Indians v. Holyfield, 
    490 U. S. 30
    , 49–52
    (1989).
    ICWA’s placement preferences, which apply to all cus-
    tody proceedings involving Indian children, are hierar-
    chical: State courts may only place the child with someone
    in a lower-ranked group when there is no available place-
    ment in a higher-ranked group. For adoption, “a preference
    shall be given” to placements with “(1) a member of the
    child’s extended family; (2) other members of the Indian
    Cite as: 
    599 U. S. ____
     (2023)             5
    Opinion of the Court
    child’s tribe; or (3) other Indian families.” §1915(a). For
    foster care, a preference is given to (1) “the Indian child’s
    extended family”; (2) “a foster home licensed, approved, or
    specified by the Indian child’s tribe”; (3) “an Indian foster
    home licensed or approved by an authorized non-Indian li-
    censing authority”; and then (4) another institution “ap-
    proved by an Indian tribe or operated by an Indian organi-
    zation which has a program suitable to meet the Indian
    child’s needs.” §1915(b). For purposes of the placement
    preferences, an “Indian” is “any person who is a member of
    an Indian tribe,” and an “Indian organization” is “any group
    . . . owned or controlled by Indians.” §§1903(3), (7). To-
    gether, these definitions mean that Indians from any tribe
    (not just the tribe to which the child has a tie) outrank un-
    related non-Indians for both adoption and foster care. And
    for foster care, institutions run or approved by any tribe
    outrank placements with unrelated non-Indian families.
    Courts must adhere to the placement preferences absent
    “good cause” to depart from them. §§1915(a), (b).
    The child’s tribe may pass a resolution altering the prior-
    itization order. §1915(c). If it does, “the agency or court
    effecting the placement shall follow such order so long as
    the placement is the least restrictive setting appropriate to
    the particular needs of the child.” Ibid. So long as the “least
    restrictive setting” condition is met, the preferences of the
    Indian child or her parent cannot trump those set by stat-
    ute or tribal resolution. But, “[w]here appropriate, the pref-
    erence of the Indian child or parent shall be considered” in
    making a placement. Ibid.
    The State must record each placement, including a de-
    scription of the efforts made to comply with ICWA’s order
    of preferences. §1915(e). Both the Secretary of the Interior
    and the child’s tribe have the right to request the record at
    any time. Ibid. State courts must also transmit all final
    adoption decrees and specified information about adoption
    proceedings to the Secretary. §1951(a).
    6                 HAALAND v. BRACKEEN
    Opinion of the Court
    B
    This case arises from three separate child custody pro-
    ceedings governed by ICWA.
    1
    A. L. M. was placed in foster care with Chad and Jennifer
    Brackeen when he was 10 months old. Because his biolog-
    ical mother is a member of the Navajo Nation and his bio-
    logical father is a member of the Cherokee Nation, he falls
    within ICWA’s definition of an “Indian child.” Both the
    Brackeens and A. L. M.’s biological parents live in Texas.
    After A. L. M. had lived with the Brackeens for more than
    a year, they sought to adopt him. A. L. M.’s biological
    mother, father, and grandmother all supported the adop-
    tion. The Navajo and Cherokee Nations did not. Pursuant
    to an agreement between the Tribes, the Navajo Nation
    designated A. L. M. as a member and informed the state
    court that it had located a potential alternative placement
    with nonrelative tribal members living in New Mexico.
    ICWA’s placement preferences ranked the proposed Navajo
    family ahead of non-Indian families like the Brackeens.
    See §1915(a).
    The Brackeens tried to convince the state court that
    there was “good cause” to deviate from ICWA’s prefer-
    ences. They presented favorable testimony from A. L. M.’s
    court-appointed guardian and from a psychological expert
    who described the strong emotional bond between A. L. M.
    and his foster parents. A. L. M.’s biological parents and
    grandmother also testified, urging the court to allow
    A. L. M. to remain with the Brackeens, “ ‘the only parents
    [A. L. M.] knows.’ ” App. 96.
    The court denied the adoption petition, and the Texas De-
    partment of Family and Protective Services announced its
    intention to move A. L. M. from the Brackeens’ home to
    New Mexico. In response, the Brackeens obtained an emer-
    Cite as: 
    599 U. S. ____
     (2023)            7
    Opinion of the Court
    gency stay of the transfer and filed this lawsuit. The Nav-
    ajo family then withdrew from consideration, and the
    Brackeens finalized their adoption of A. L. M.
    The Brackeens now seek to adopt A. L. M.’s biological sis-
    ter, Y. R. J., again over the opposition of the Navajo Nation.
    And while the Brackeens hope to foster and adopt other In-
    dian children in the future, their fraught experience with
    A. L. M.’s adoption makes them hesitant to do so.
    2
    Altagracia Hernandez chose Nick and Heather Libretti
    as adoptive parents for her newborn daughter, Baby O. The
    Librettis took Baby O. home from the hospital when she
    was three days old, and Hernandez, who lived nearby, vis-
    ited Baby O. frequently. Baby O.’s biological father visited
    only once but supported the adoption.
    Hernandez is not an Indian. But Baby O.’s biological fa-
    ther is descended from members of the Ysleta del Sur
    Pueblo Tribe, and the Tribe enrolled Baby O. as a member.
    As a result, the adoption proceeding was governed by
    ICWA. The Tribe exercised its right to intervene and ar-
    gued, over Hernandez’s objection, that Baby O. should be
    moved from the Librettis’ home in Nevada to the Tribe’s
    reservation in El Paso, Texas. It presented a number of po-
    tential placements on the reservation for Baby O., and state
    officials began to investigate them. After Hernandez and
    the Librettis joined this lawsuit, however, the Tribe with-
    drew its challenge to the adoption, and the Librettis final-
    ized their adoption of Baby O. The Librettis stayed in the
    litigation because they planned to foster and possibly adopt
    Indian children in the future.
    3
    Jason and Danielle Clifford, who live in Minnesota, fos-
    tered Child P., whose maternal grandmother belongs to the
    White Earth Band of Ojibwe Tribe. When Child P. entered
    8                  HAALAND v. BRACKEEN
    Opinion of the Court
    state custody around the age of three, her mother informed
    the court that ICWA did not apply because Child P. was not
    eligible for tribal membership. The Tribe wrote a letter to
    the court confirming the same.
    After two years in the foster care system, Child P. was
    placed with the Cliffords, who eventually sought to adopt
    her. The Tribe intervened in the proceedings and, with no
    explanation for its change in position, informed the court
    that Child P. was in fact eligible for tribal membership.
    Later, the Tribe announced that it had enrolled Child P. as
    a member. To comply with ICWA, Minnesota placed Child
    P. with her maternal grandmother, who had lost her foster
    license due to a criminal conviction. The Cliffords contin-
    ued to pursue the adoption, but, citing ICWA, the court de-
    nied their motion. Like the other families, the Cliffords in-
    tend to foster or adopt Indian children in the future.
    C
    The Brackeens, the Librettis, Hernandez, and the
    Cliffords (whom we will refer to collectively as the “individ-
    ual petitioners”) filed this suit in federal court against the
    United States, the Department of the Interior and its Sec-
    retary, the Bureau of Indian Affairs (BIA) and its Director,
    and the Department of Health and Human Services and its
    Secretary (whom we will refer to collectively as the “federal
    parties”). The individual petitioners were joined by the
    States of Texas, Indiana, and Louisiana—although only
    Texas continues to challenge ICWA before this Court. Sev-
    eral Indian Tribes intervened to defend the law alongside
    the federal parties.
    Petitioners challenged ICWA as unconstitutional on mul-
    tiple grounds. They asserted that Congress lacks authority
    to enact ICWA and that several of ICWA’s requirements vi-
    olate the anticommandeering principle of the Tenth
    Amendment. They argued that ICWA employs racial clas-
    sifications that unlawfully hinder non-Indian families from
    Cite as: 
    599 U. S. ____
     (2023)                   9
    Opinion of the Court
    fostering or adopting Indian children. And they challenged
    §1915(c)—the provision that allows tribes to alter the pri-
    oritization order—on the ground that it violates the non-
    delegation doctrine.1
    The District Court granted petitioners’ motion for sum-
    mary judgment on their constitutional claims, and a divided
    panel of the Fifth Circuit reversed. Brackeen v. Bernhardt,
    
    937 F. 3d 406
     (2019). After rehearing the case en banc, the
    Fifth Circuit affirmed in part and reversed in part. 
    994 F. 3d 249
     (2021) (per curiam). The en banc court concluded
    that ICWA does not exceed Congress’s legislative power,
    that §1915(c) does not violate the nondelegation doctrine,
    and that some of ICWA’s placement preferences satisfy the
    guarantee of equal protection. Id., at 267–269. The court
    was evenly divided as to whether ICWA’s other prefer-
    ences—those prioritizing “other Indian families” and “In-
    dian foster home[s]” over non-Indian families—unconstitu-
    tionally discriminate on the basis of race. Id., at 268. The
    Fifth Circuit therefore affirmed the District Court’s ruling
    that these preferences are unconstitutional.
    Petitioners’ Tenth Amendment arguments effectively
    succeeded across the board. The Fifth Circuit held that
    §1912(d)’s “active efforts” requirement, §1912(e)’s and
    §1912(f )’s expert witness requirements, and §1915(e)’s
    recordkeeping requirement unconstitutionally comman-
    deer the States. Ibid. It divided evenly with respect to the
    other provisions that petitioners challenge here: §1912(a)’s
    notice requirement, §1915(a) and §1915(b)’s placement
    preferences, and §1951(a)’s recordkeeping requirement.
    Ibid. So the Fifth Circuit affirmed the District Court’s hold-
    ——————
    1 Petitioners raised several other challenges that are not before this
    Court, including that ICWA’s implementing regulations are arbitrary
    and capricious in violation of the Administrative Procedure Act.
    10                      HAALAND v. BRACKEEN
    Opinion of the Court
    ing that these requirements, too, violate the Tenth Amend-
    ment.
    We granted certiorari.2 
    595 U. S. ____
     (2022).
    II
    A
    We begin with petitioners’ claim that ICWA exceeds Con-
    gress’s power under Article I. In a long line of cases, we
    have characterized Congress’s power to legislate with re-
    spect to the Indian tribes as “ ‘plenary and exclusive.’ ”
    United States v. Lara, 
    541 U. S. 193
    , 200 (2004); South Da-
    kota v. Yankton Sioux Tribe, 
    522 U. S. 329
    , 343 (1998)
    (“Congress possesses plenary power over Indian affairs”);
    Washington v. Confederated Bands and Tribes of Yakima
    Nation, 
    439 U. S. 463
    , 470 (1979) (Congress exercises “ple-
    nary and exclusive power over Indian affairs”); Winton v.
    Amos, 
    255 U. S. 373
    , 391 (1921) (“It is thoroughly estab-
    lished that Congress has plenary authority over the Indians
    and all their tribal relations”); Lone Wolf v. Hitchcock, 
    187 U. S. 553
    , 565 (1903) (“Congress possesse[s] a paramount
    power over the property of the Indians”); Stephens v. Cher-
    okee Nation, 
    174 U. S. 445
    , 478 (1899) (“Congress possesses
    plenary power of legislation in regard to” the Indian tribes).
    Our cases leave little doubt that Congress’s power in this
    field is muscular, superseding both tribal and state author-
    ity. Santa Clara Pueblo v. Martinez, 
    436 U. S. 49
    , 56 (1978)
    (“Congress has plenary authority to limit, modify or elimi-
    nate the powers of local self-government which the tribes
    otherwise possess”); Dick v. United States, 
    208 U. S. 340
    ,
    353 (1908) (“Congress has power to regulate commerce with
    ——————
    2 Hernandez and the families, the State of Texas, the federal parties,
    and the Tribes all filed cross-petitions for certiorari. After the cases were
    consolidated, Hernandez, the families, and Texas proceeded as petition-
    ers before this Court, and the federal parties and the Tribes proceeded
    as respondents.
    Cite as: 
    599 U. S. ____
     (2023)            11
    Opinion of the Court
    the Indian tribes, and such power is superior and para-
    mount to the authority of any State within whose limits are
    Indian tribes”).
    To be clear, however, “plenary” does not mean “free-float-
    ing.” A power unmoored from the Constitution would lack
    both justification and limits. So like the rest of its legisla-
    tive powers, Congress’s authority to regulate Indians must
    derive from the Constitution, not the atmosphere. Our
    precedent traces that power to multiple sources.
    The Indian Commerce Clause authorizes Congress “[t]o
    regulate Commerce . . . with the Indian Tribes.” Art. I, §8,
    cl. 3. We have interpreted the Indian Commerce Clause to
    reach not only trade, but certain “Indian affairs” too. Cot-
    ton Petroleum Corp. v. New Mexico, 
    490 U. S. 163
    , 192
    (1989). Notably, we have declined to treat the Indian Com-
    merce Clause as interchangeable with the Interstate Com-
    merce Clause. 
    Ibid.
     While under the Interstate Commerce
    Clause, States retain “some authority” over trade, we have
    explained that “virtually all authority over Indian com-
    merce and Indian tribes” lies with the Federal Government.
    Seminole Tribe of Fla. v. Florida, 
    517 U. S. 44
    , 62 (1996).
    The Treaty Clause—which provides that the President
    “shall have Power, by and with the Advice and Consent of
    the Senate, to make Treaties”—provides a second source of
    power over Indian affairs. Art. II, §2, cl. 2. Until the late
    19th century, relations between the Federal Government
    and the Indian tribes were governed largely by treaties.
    Lara, 
    541 U. S., at 201
    . Of course, the treaty power “does
    not literally authorize Congress to act legislatively,” since
    it is housed in Article II rather than Article I. 
    Ibid.
     Never-
    theless, we have asserted that “treaties made pursuant to
    that power can authorize Congress to deal with ‘matters’
    with which otherwise ‘Congress could not deal.’ ” 
    Ibid.
     And
    even though the United States formally ended the practice
    of entering into new treaties with the Indian tribes in 1871,
    this decision did not limit Congress’s power “to legislate on
    12                  HAALAND v. BRACKEEN
    Opinion of the Court
    problems of Indians” pursuant to pre-existing treaties. An-
    toine v. Washington, 
    420 U. S. 194
    , 203 (1975) (emphasis
    deleted).
    We have also noted that principles inherent in the Con-
    stitution’s structure empower Congress to act in the field of
    Indian affairs. See Morton v. Mancari, 
    417 U. S. 535
    , 551–
    552 (1974) (“The plenary power of Congress to deal with the
    special problems of Indians is drawn both explicitly and im-
    plicitly from the Constitution itself ”). At the founding, “ ‘In-
    dian affairs were more an aspect of military and foreign pol-
    icy than a subject of domestic or municipal law.’ ” Lara, 
    541 U. S., at 201
    . With this in mind, we have posited that Con-
    gress’s legislative authority might rest in part on “the Con-
    stitution’s adoption of preconstitutional powers necessarily
    inherent in any Federal Government, namely, powers that
    this Court has described as ‘necessary concomitants of na-
    tionality.’ ” 
    Ibid.
     (quoting United States v. Curtiss-Wright
    Export Corp., 
    299 U. S. 304
    , 315–322 (1936)).
    Finally, the “trust relationship between the United
    States and the Indian people” informs the exercise of legis-
    lative power. United States v. Mitchell, 
    463 U. S. 206
    , 225–
    226 (1983). As we have explained, the Federal Government
    has “ ‘charged itself with moral obligations of the highest
    responsibility and trust’ ” toward Indian tribes. United
    States v. Jicarilla Apache Nation, 
    564 U. S. 162
    , 176 (2011);
    Seminole Nation v. United States, 
    316 U. S. 286
    , 296 (1942)
    (“[T]his Court has recognized the distinctive obligation of
    trust incumbent upon the Government in its dealings with
    these dependent and sometimes exploited people”). The
    contours of this “special relationship” are undefined.
    Mancari, 
    417 U. S., at 552
    .
    In sum, Congress’s power to legislate with respect to In-
    dians is well established and broad. Consistent with that
    breadth, we have not doubted Congress’s ability to legislate
    across a wide range of areas, including criminal law, domes-
    tic violence, employment, property, tax, and trade. See, e.g.,
    Cite as: 
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     (2023)            13
    Opinion of the Court
    Lara, 
    541 U. S., at 210
     (law allowing tribes to prosecute
    nonmember Indians who committed crimes on tribal land);
    United States v. Bryant, 
    579 U. S. 140
    , 142–143 (2016) (law
    criminalizing domestic violence in Indian country);
    Mancari, 
    417 U. S., at 537
     (policy granting Indians employ-
    ment preferences); United States v. Antelope, 
    430 U. S. 641
    ,
    648 (1977) (law establishing a criminal code for Indian
    country); Yankton Sioux Tribe, 
    522 U. S., at 343
     (law alter-
    ing the boundaries of a reservation); Sunderland v. United
    States, 
    266 U. S. 226
    , 231–232 (1924) (agency action remov-
    ing the restrictions on alienation of a homestead allotted to
    an Indian); Warren Trading Post Co. v. Arizona Tax
    Comm’n, 
    380 U. S. 685
    , 691, n. 18 (1965) (law granting tribe
    immunity from state taxation); United States v. Algoma
    Lumber Co., 
    305 U. S. 415
    , 417, 421 (1939) (law regulating
    the sale of timber by an Indian tribe). Indeed, we have only
    rarely concluded that a challenged statute exceeded Con-
    gress’s power to regulate Indian affairs. See, e.g., Seminole
    Tribe, 
    517 U. S., at
    72–73.
    Admittedly, our precedent is unwieldy, because it rarely
    ties a challenged statute to a specific source of constitu-
    tional authority. That makes it difficult to categorize cases
    and even harder to discern the limits on Congress’s power.
    Still, we have never wavered in our insistence that Con-
    gress’s Indian affairs power “ ‘is not absolute.’ ” Delaware
    Tribal Business Comm. v. Weeks, 
    430 U. S. 73
    , 84 (1977);
    United States v. Alcea Band of Tillamooks, 
    329 U. S. 40
    , 54
    (1946) (“The power of Congress over Indian affairs may be
    of a plenary nature; but it is not absolute”); United States v.
    Creek Nation, 
    295 U. S. 103
    , 110 (1935) (plenary power is
    “subject to limitations inhering in such a guardianship and
    to pertinent constitutional restrictions”). It could not be
    otherwise—Article I gives Congress a series of enumerated
    powers, not a series of blank checks. Thus, we reiterate
    that Congress’s authority to legislate with respect to Indi-
    ans is not unbounded. It is plenary within its sphere, but
    14                     HAALAND v. BRACKEEN
    Opinion of the Court
    even a sizeable sphere has borders.3
    B
    Petitioners contend that ICWA exceeds Congress’s
    power. Their principal theory, and the one accepted by both
    JUSTICE ALITO and the dissenters in the Fifth Circuit, is
    that ICWA treads on the States’ authority over family law.
    Domestic relations have traditionally been governed by
    state law; thus, federal power over Indians stops where
    state power over the family begins. Or so the argument
    goes.
    It is true that Congress lacks a general power over do-
    mestic relations, In re Burrus, 
    136 U. S. 586
    , 593–594
    (1890), and, as a result, responsibility for regulating mar-
    riage and child custody remains primarily with the States,
    Sosna v. Iowa, 
    419 U. S. 393
    , 404 (1975). See also Moore v.
    Sims, 
    442 U. S. 415
    , 435 (1979). But the Constitution does
    not erect a firewall around family law. On the contrary,
    when Congress validly legislates pursuant to its Article I
    powers, we “ha[ve] not hesitated” to find conflicting state
    family law preempted, “[n]otwithstanding the limited ap-
    plication of federal law in the field of domestic relations
    generally.” Ridgway v. Ridgway, 
    454 U. S. 46
    , 54 (1981)
    (federal law providing life insurance preempted state
    family-property law); see also Hillman v. Maretta, 
    569 U. S. 483
    , 491 (2013) (“state laws ‘governing the economic aspects
    of domestic relations . . . must give way to clearly conflicting
    federal enactments’ ” (alteration in original)). In fact, we
    have specifically recognized Congress’s power to displace
    ——————
    3 JUSTICE ALITO’s dissent criticizes the Court for “violating one of the
    most basic laws of logic” with our conclusion that “Congress’s power over
    Indian affairs is ‘plenary’ but not ‘absolute.’ ” Post, at 3–4. Yet the dis-
    sent goes on to make that very same observation. Post, at 4 (“[E]ven so-
    called plenary powers cannot override foundational constitutional con-
    straints”).
    Cite as: 
    599 U. S. ____
     (2023)           15
    Opinion of the Court
    the jurisdiction of state courts in adoption proceedings in-
    volving Indian children. Fisher v. District Court of Six-
    teenth Judicial Dist. of Mont., 
    424 U. S. 382
    , 390 (1976) (per
    curiam).
    Petitioners are trying to turn a general observation (that
    Congress’s Article I powers rarely touch state family law)
    into a constitutional carveout (that family law is wholly ex-
    empt from federal regulation). That argument is a non-
    starter. As James Madison said to Members of the First
    Congress, when the Constitution conferred a power on Con-
    gress, “they might exercise it, although it should interfere
    with the laws, or even the Constitution of the States.” 2
    Annals of Cong. 1897 (1791). Family law is no exception.
    C
    Petitioners come at the problem from the opposite direc-
    tion too: Even if there is no family law carveout to the In-
    dian affairs power, they contend that Congress’s authority
    does not stretch far enough to justify ICWA. Ticking
    through the various sources of power, petitioners assert
    that the Constitution does not authorize Congress to regu-
    late custody proceedings for Indian children. Their argu-
    ments fail to grapple with our precedent, and because they
    bear the burden of establishing ICWA’s unconstitutionality,
    we cannot sustain their challenge to the law. See Lujan v.
    G & G Fire Sprinklers, Inc., 
    532 U. S. 189
    , 198 (2001).
    Take the Indian Commerce Clause, which is petitioners’
    primary focus. According to petitioners, the Clause author-
    izes Congress to legislate only with respect to Indian tribes
    as government entities, not Indians as individuals. Brief
    for Individual Petitioners 47–50. But we held more than a
    century ago that “commerce with the Indian tribes, means
    commerce with the individuals composing those tribes.”
    United States v. Holliday, 
    3 Wall. 407
    , 416–417 (1866) (law
    prohibiting the sale of alcohol to Indians in Indian country);
    United States v. Nice, 
    241 U. S. 591
    , 600 (1916) (same). So
    16                 HAALAND v. BRACKEEN
    Opinion of the Court
    that argument is a dead end.
    Petitioners also assert that ICWA takes the “commerce”
    out of the Indian Commerce Clause. Their consistent re-
    frain is that “children are not commodities that can be
    traded.” Brief for Individual Petitioners 16; Brief for Peti-
    tioner Texas 23 (“[C]hildren are not commodities”); id., at
    18 (“Children are not articles of commerce”). Rhetorically,
    it is a powerful point—of course children are not commercial
    products. Legally, though, it is beside the point. As we al-
    ready explained, our precedent states that Congress’s
    power under the Indian Commerce Clause encompasses not
    only trade but also “Indian affairs.” Cotton Petroleum, 490
    U. S., at 192. Even the judges who otherwise agreed with
    petitioners below rejected this narrow view of the Indian
    Commerce Clause as inconsistent with both our cases and
    “[l]ongstanding patterns of federal legislation.” 994 F. 3d,
    at 374–375 (principal opinion of Duncan, J.). Rather than
    dealing with this precedent, however, petitioners virtually
    ignore it.
    Next, petitioners argue that ICWA cannot be authorized
    by principles inherent in the Constitution’s structure be-
    cause those principles “extend, at most, to matters of war
    and peace.” Brief for Petitioner Texas 28. But that is not
    what our cases say. We have referred generally to the pow-
    ers “necessarily inherent in any Federal Government,” and
    we have offered examples like “creating departments of In-
    dian affairs, appointing Indian commissioners, and . . . ‘se-
    curing and preserving the friendship of the Indian Na-
    tions’ ”—none of which are military actions. Lara, 
    541 U. S., at
    201–202. Once again, petitioners make no argu-
    ment that takes our cases on their own terms.
    Finally, petitioners observe that ICWA does not imple-
    ment a federal treaty. Brief for Petitioner Texas 24–27;
    Brief for Individual Petitioners 56–58. This does not get
    them very far either, since Congress did not purport to en-
    act ICWA pursuant to the Treaty Clause power and the
    Cite as: 
    599 U. S. ____
     (2023)                    17
    Opinion of the Court
    Fifth Circuit did not uphold ICWA on that rationale.
    Presumably recognizing these obstacles, petitioners turn
    to criticizing our precedent as inconsistent with the Consti-
    tution’s original meaning. Yet here too, they offer no ac-
    count of how their argument fits within the landscape of our
    case law. For instance, they neither ask us to overrule the
    precedent they criticize nor try to reconcile their approach
    with it. They are also silent about the potential conse-
    quences of their position. Would it undermine established
    cases and statutes? If so, which ones? Petitioners do not
    say.
    We recognize that our case law puts petitioners in a diffi-
    cult spot. We have often sustained Indian legislation with-
    out specifying the source of Congress’s power, and we have
    insisted that Congress’s power has limits without saying
    what they are. Yet petitioners’ strategy for dealing with the
    confusion is not to offer a theory for rationalizing this body
    of law—that would at least give us something to work with.4
    Instead, they frame their arguments as if the slate were
    clean. More than two centuries in, it is anything but.
    If there are arguments that ICWA exceeds Congress’s au-
    thority as our precedent stands today, petitioners do not
    make them. We therefore decline to disturb the Fifth Cir-
    cuit’s conclusion that ICWA is consistent with Article I.
    ——————
    4 Texas floated a theory for the first time at oral argument. It said
    that, taken together, our plenary power cases fall into three buckets: (1)
    those allowing Congress to legislate pursuant to an enumerated power,
    such as the Indian Commerce Clause or the Treaty Clause; (2) those al-
    lowing Congress to regulate the tribes as government entities; and (3)
    those allowing Congress to enact legislation that applies to federal or
    tribal land. Tr. of Oral Arg. 55. According to Texas, ICWA is unconsti-
    tutional because it does not fall within any of these categories. We have
    never broken down our cases this way. But even if Texas’s theory is de-
    scriptively accurate, Texas offers no explanation for why Congress’s
    power is limited to these categories.
    18                    HAALAND v. BRACKEEN
    Opinion of the Court
    III
    We now turn to petitioners’ host of anticommandeering
    arguments, which we will break into three categories.
    First, petitioners challenge certain requirements that apply
    in involuntary proceedings to place a child in foster care or
    terminate parental rights: the requirements that an initi-
    ating party demonstrate “active efforts” to keep the Indian
    family together; serve notice of the proceeding on the parent
    or Indian custodian and tribe; and demonstrate, by a
    heightened burden of proof and expert testimony, that the
    child is likely to suffer “serious emotional or physical dam-
    age” if the parent or Indian custodian retains custody. Sec-
    ond, petitioners challenge ICWA’s placement preferences.
    They claim that Congress can neither force state agencies
    to find preferred placements for Indian children nor require
    state courts to apply federal standards when making cus-
    tody determinations. Third, they insist that Congress can-
    not force state courts to maintain or transmit to the Federal
    Government records of custody proceedings involving In-
    dian children.5
    A
    As a reminder, “involuntary proceedings” are those to
    which a parent does not consent. §1912; 
    25 CFR §23.2
    .
    Heightened protections for parents and tribes apply in this
    context, and while petitioners challenge most of them, the
    “active efforts” provision is their primary target. That pro-
    vision requires “[a]ny party” seeking to effect an involun-
    tary foster care placement or termination of parental rights
    to “satisfy the court that active efforts have been made to
    provide remedial services and rehabilitative programs de-
    signed to prevent the breakup of the Indian family and that
    ——————
    5 All petitioners argue that these provisions violate the anticomman-
    deering principle. Since Texas has standing to raise these claims, we
    need not address whether the individual petitioners also have standing
    to do so.
    Cite as: 
    599 U. S. ____
     (2023)            19
    Opinion of the Court
    these efforts have proved unsuccessful.” §1912(d). Accord-
    ing to petitioners, this subsection directs state and local
    agencies to provide extensive services to the parents of In-
    dian children. It is well established that the Tenth Amend-
    ment bars Congress from “command[ing] the States’ offic-
    ers, or those of their political subdivisions, to administer or
    enforce a federal regulatory program.” Printz v. United
    States, 
    521 U. S. 898
    , 935 (1997). The “active efforts” pro-
    vision, petitioners say, does just that.
    Petitioners’ argument has a fundamental flaw: To suc-
    ceed, they must show that §1912(d) harnesses a State’s leg-
    islative or executive authority. But the provision applies to
    “any party” who initiates an involuntary proceeding, thus
    sweeping in private individuals and agencies as well as gov-
    ernment entities. A demand that either public or private
    actors can satisfy is unlikely to require the use of sovereign
    power. Murphy v. National Collegiate Athletic Assn., 
    584 U. S. ___
    , ___–___ (2018) (slip op., at 19–20).
    Notwithstanding the term “any party,” petitioners insist
    that §1912(d) is “best read” as a command to the States. See
    id., at ___ (slip op., at 21) (whether a federal law directly
    regulates the States depends on how it is “best read”). They
    contend that, as a practical matter, States—not private par-
    ties—initiate the vast majority of involuntary proceedings.
    Despite the breadth of the language, the argument goes,
    States are obviously the “parties” to whom the statute re-
    fers.
    The record contains no evidence supporting the assertion
    that States institute the vast majority of involuntary pro-
    ceedings. Examples of private suits are not hard to find, so
    we are skeptical that their number is negligible. See, e.g.,
    Adoptive Couple v. Baby Girl, 
    570 U. S. 637
    , 644–646
    (2013) (prospective adoptive parents); In re Guardianship
    of Eliza W., 
    304 Neb. 995
    , 997, 
    938 N. W. 2d 307
    , 310 (2020)
    (grandmother); In re Guardianship of J. C. D., 2004 S. D.
    96, ¶4, 
    686 N. W. 2d 647
    , 648 (2004) (grandparents); In re
    20                     HAALAND v. BRACKEEN
    Opinion of the Court
    Adoption of T. A. W., 
    186 Wash. 2d 828
    , 835–837, 850–851,
    
    383 P. 3d 492
    , 494–495, 501–502 (2016) (en banc) (mother
    and stepfather); J. W. v. R. J., 
    951 P. 2d 1206
    , 1212–1213
    (Alaska 1998) (same). Indeed, Texas’s own family code per-
    mits certain private parties to initiate suits for the termi-
    nation of parental rights. 
    Tex. Fam. Code Ann. §102.003
    (a)
    (West Cum. Supp. 2022); see Reply Brief for Texas 27. And
    while petitioners treat “active efforts” as synonymous with
    “government programs,” state courts have applied the “ac-
    tive efforts” requirement in private suits too. See, e.g., In
    re Adoption of T. A. W., 186 Wash. 2d, at 851–852, 383
    P. 3d, at 502–503; S. S. v. Stephanie H., 
    241 Ariz. 419
    , 424,
    
    388 P. 3d 569
    , 574 (App. 2017); In re N. B., 
    199 P. 3d 16
    ,
    23–24 (Colo. App. 2007). That is consistent with ICWA’s
    findings, which describe the role that both public and pri-
    vate actors played in the unjust separation of Indian chil-
    dren from their families and tribes. §1901. Given all this,
    it is implausible that §1912(d) is directed primarily, much
    less exclusively, at the States.6
    Legislation that applies “evenhandedly” to state and pri-
    vate actors does not typically implicate the Tenth Amend-
    ment. Murphy, 584 U. S., at ___ (slip op., at 20). In South
    ——————
    6 To bolster their claim that the “active efforts” requirement is aimed
    at the States, petitioners point to a statement from the Department of
    the Interior asserting that the reference to “active efforts” reflects Con-
    gress’s intent “to require States to affirmatively provide Indian families
    with substantive services and not merely make the services available.”
    
    81 Fed. Reg. 38791
     (emphasis added). This statement does not move the
    needle. Neither §1912(d) nor the regulations limit themselves to States;
    moreover, the regulations plainly contemplate that services will come
    from private organizations as well as the government. 
    25 CFR §23.102
    (“Agency means a nonprofit, for-profit, or governmental organization . . .
    that performs, or provides services to biological parents, foster parents,
    or adoptive parents to assist in the administrative and social work nec-
    essary for foster, preadoptive, or adoptive placements”). The Depart-
    ment’s statement is thus consistent with the plain language of §1912,
    which applies to both private and state actors.
    Cite as: 
    599 U. S. ____
     (2023)           21
    Opinion of the Court
    Carolina v. Baker, for example, we held that a generally ap-
    plicable law regulating unregistered bonds did not com-
    mandeer the States; rather, it required States “wishing to
    engage in certain activity [to] take administrative and
    sometimes legislative action to comply with federal stand-
    ards regulating that activity.” 
    485 U. S. 505
    , 514–515
    (1988). We reached a similar conclusion in Reno v. Condon,
    which dealt with a statute prohibiting state motor vehicle
    departments (DMVs) from selling a driver’s personal infor-
    mation without the driver’s consent. 
    528 U. S. 141
    , 143–
    144 (2000). The law regulated not only the state DMVs, but
    also private parties who had already purchased this infor-
    mation and sought to resell it. 
    Id., at 146
    . Applying Baker,
    we concluded that the Act did not “require the States in
    their sovereign capacity to regulate their own citizens,” “en-
    act any laws or regulations,” or “assist in the enforcement
    of federal statutes regulating private individuals.” 
    528 U. S., at
    150–151. Instead, it permissibly “regulate[d] the
    States as the owners of data bases.” 
    Id., at 151
    .
    Petitioners argue that Baker and Condon are distinguish-
    able because they addressed laws regulating a State’s com-
    mercial activity, while ICWA regulates a State’s “core sov-
    ereign function of protecting the health and safety of
    children within its borders.” Brief for Petitioner Texas 66.
    A State can stop selling bonds or a driver’s personal infor-
    mation, petitioners say, but it cannot withdraw from the
    area of child welfare—protecting children is the business of
    government, even if it is work in which private parties
    share. Nor, of course, could Texas avoid ICWA by excluding
    only Indian children from social services. Because States
    cannot exit the field, they are hostage to ICWA, which re-
    quires them to implement Congress’s regulatory program
    for the care of Indian children and families. 
    Id.,
     at 64–65;
    Reply Brief for Texas 27.
    This argument is presumably directed at situations in
    22                 HAALAND v. BRACKEEN
    Opinion of the Court
    which only the State can rescue a child from neglectful par-
    ents. But §1912 applies to more than child neglect—for in-
    stance, it applies when a biological mother arranges for a
    private adoption without the biological father’s consent.
    See, e.g., Adoptive Couple, 
    570 U. S., at
    643–644. And even
    when a child is trapped in an abusive home, the State is not
    necessarily the only option for rescue—for instance, a
    grandmother can seek guardianship of a grandchild whose
    parents are failing to care for her. See, e.g., In re Guardi-
    anship of Eliza W., 
    304 Neb., at
    996–997, 938 N. W. 2d, at
    309–310. Petitioners do not distinguish between these var-
    ied situations, much less isolate a domain in which only the
    State can act. Some amici assert that, at the very least,
    removing children from imminent danger in the home falls
    exclusively to the government. Brief for Academy of Adop-
    tion and Assisted Reproduction Attorneys et al. as Amici
    Curiae 14 (“Amici are aware of no state in which a private
    actor may lawfully remove a child from his existing home”).
    Maybe so—but that does not help petitioners’ commandeer-
    ing argument, because the “active efforts” requirement does
    not apply to emergency removals. §1922. If ICWA com-
    mandeers state performance of a “core sovereign function,”
    petitioners do not give us the details.
    When a federal statute applies on its face to both private
    and state actors, a commandeering argument is a heavy
    lift—and petitioners have not pulled it off. Both state and
    private actors initiate involuntary proceedings. And, if
    there is a core of involuntary proceedings committed exclu-
    sively to the sovereign, Texas neither identifies its contours
    nor explains what §1912(d) requires of a State in that con-
    text. Petitioners have therefore failed to show that the “ac-
    tive efforts” requirement commands the States to deploy
    their executive or legislative power to implement federal In-
    dian policy.
    As for petitioners’ challenges to other provisions of
    Cite as: 
    599 U. S. ____
     (2023)           23
    Opinion of the Court
    §1912—the notice requirement, expert witness require-
    ment, and evidentiary standards—we doubt that require-
    ments placed on a State as litigant implicate the Tenth
    Amendment. But in any event, these provisions, like
    §1912(d), apply to both private and state actors, so they too
    pose no anticommandeering problem.
    B
    Petitioners also raise a Tenth Amendment challenge to
    §1915, which dictates placement preferences for Indian
    children. According to petitioners, this provision orders
    state agencies to perform a “diligent search” for placements
    that satisfy ICWA’s hierarchy. Brief for Petitioner Texas
    63; Reply Brief for Texas 24; see also Brief for Individual
    Petitioners 67–68. Petitioners assert that the Department
    of the Interior understands §1915 this way, 
    25 CFR §23.132
    (c)(5), and the Tribes who intervene in proceedings
    governed by ICWA share that understanding—for example,
    “the Librettis’ adoption of Baby O was delayed because the
    Ysleta del Sur Pueblo Tribe demanded that county officials
    exhaustively search for a placement with the Tribe first.”
    Reply Brief for Texas 24–25. Just as Congress cannot com-
    pel state officials to search databases to determine the law-
    fulness of gun sales, Printz, 
    521 U. S., at
    902–904, petition-
    ers argue, Congress cannot compel state officials to search
    for a federally preferred placement.
    As an initial matter, this argument encounters the same
    problem that plagues petitioners with respect to §1912: Pe-
    titioners have not shown that the “diligent search” require-
    ment, which applies to both private and public parties, de-
    mands the use of state sovereign authority. But this
    argument fails for another reason too: Section 1915 does not
    require anyone, much less the States, to search for alterna-
    tive placements. As the United States emphasizes, peti-
    tioners’ interpretation “cannot be squared with this Court’s
    decision in Adoptive Couple,” which held that “ ‘there simply
    24                 HAALAND v. BRACKEEN
    Opinion of the Court
    is no “preference” to apply if no alternative party that is el-
    igible to be preferred . . . has come forward.’ ” Brief for Fed-
    eral Parties 44 (quoting 
    570 U. S., at 654
    ); Adoptive Couple,
    
    570 U. S., at
    654 (“§1915(a)’s preferences are inapplicable
    in cases where no alternative party has formally sought to
    adopt the child”). Instead, the burden is on the tribe or
    other objecting party to produce a higher-ranked place-
    ment. Ibid. So, as it stands, petitioners assert an anticom-
    mandeering challenge to a provision that does not com-
    mand state agencies to do anything.
    State courts are a different matter. ICWA indisputably
    requires them to apply the placement preferences in mak-
    ing custody determinations. §§1915(a), (b). Petitioners ar-
    gue that this too violates the anticommandeering doctrine.
    To be sure, they recognize that Congress can require state
    courts, unlike state executives and legislatures, to enforce
    federal law. See New York v. United States, 
    505 U. S. 144
    ,
    178–179 (1992) (“Federal statutes enforceable in state
    courts do, in a sense, direct state judges to enforce them,
    but this sort of federal ‘direction’ of state judges is man-
    dated by the text of the Supremacy Clause”). But they draw
    a distinction between requiring state courts to entertain
    federal causes of action and requiring them to apply federal
    law to state causes of action. They claim that if state law
    provides the cause of action—as Texas law does here—then
    the State gets to call the shots, unhindered by any federal
    instruction to the contrary. Brief for Individual Petitioners
    62–63, 66–67.
    This argument runs headlong into the Constitution. The
    Supremacy Clause provides that “the Laws of the United
    States . . . shall be the supreme Law of the Land; and the
    Judges in every State shall be bound thereby, any Thing in
    the Constitution or Laws of any state to the Contrary not-
    withstanding.” Art. VI, cl. 2. Thus, when Congress enacts
    a valid statute pursuant to its Article I powers, “state law
    is naturally preempted to the extent of any conflict with a
    Cite as: 
    599 U. S. ____
     (2023)                    25
    Opinion of the Court
    federal statute.” Crosby v. National Foreign Trade Council,
    
    530 U. S. 363
    , 372 (2000). End of story. That a federal law
    modifies a state law cause of action does not limit its
    preemptive effect. See, e.g., Hillman, 
    569 U. S., at
    493–494
    (federal law establishing an “ ‘order of precedence’ ” for ben-
    eficiaries of life insurance preempted state law); Egelhoff v.
    Egelhoff, 
    532 U. S. 141
    , 151–152 (2001) (Employee Retire-
    ment Income Security Act preempted state law regarding
    the economic consequences of divorce); Wissner v. Wissner,
    
    338 U. S. 655
    , 660–661 (1950) (federal military benefits law
    preempted state community-property rules).
    C
    Finally, we turn to ICWA’s recordkeeping provisions.
    Section 1951(a) requires courts to provide the Secretary of
    the Interior with a copy of the final order in the adoptive
    placement of any Indian child. The court must also provide
    “other information as may be necessary to show” the child’s
    name and tribal affiliation, the names and addresses of the
    biological parents and adoptive parents, and the identity of
    any agency with information about the adoptive placement.
    Section 1915(e) requires the State to “maintai[n]” a record
    “evidencing the efforts to comply with the order of prefer-
    ence” specified by ICWA. The record “shall be made avail-
    able at any time upon the request of the Secretary or the
    Indian child’s tribe.” Petitioners argue that Congress can-
    not conscript the States into federal service by assigning
    them recordkeeping tasks.7
    ——————
    7 Though §1915(e) does not specify that the records be retained by state
    courts, as opposed to state agencies, context makes clear that a “record
    of each such placement” refers to the state court’s placement determina-
    tion. See Mississippi Band of Choctaw Indians v. Holyfield, 
    490 U. S. 30
    ,
    40, n. 13 (1989). True, the provision leaves it up to the State whether to
    keep the records with a court or agency. See 
    25 CFR §23.141
    (c) (“The
    State court or agency should notify the BIA whether these records are
    maintained within the court system or by a State agency”). But allowing
    26                  HAALAND v. BRACKEEN
    Opinion of the Court
    The anticommandeering doctrine applies “distinctively”
    to a state court’s adjudicative responsibilities. Printz, 
    521 U. S., at 907
    . As we just explained, this distinction is evi-
    dent in the Supremacy Clause, which refers specifically to
    state judges. Art. VI, cl. 2. From the beginning, the text
    manifested in practice: As originally understood, the Con-
    stitution allowed Congress to require “state judges to en-
    force federal prescriptions, insofar as those prescriptions
    related to matters appropriate for the judicial power.”
    Printz, 
    521 U. S., at 907
     (emphasis deleted). In Printz, we
    indicated that this principle may extend to tasks that are
    “ancillary” to a “quintessentially adjudicative task”—such
    as “recording, registering, and certifying” documents. 
    Id., at 908, n. 2
    .
    Petitioners reject Printz’s observation, insisting that
    there is a distinction between rules of decision (which state
    courts must follow) and recordkeeping requirements (which
    they can ignore). But Printz described numerous historical
    examples of Congress imposing recordkeeping and report-
    ing requirements on state courts. The early Congresses
    passed laws directing state courts to perform certain tasks
    fairly described as “ancillary” to the courts’ adjudicative du-
    ties. For example, state courts were required to process and
    record applications for United States citizenship. Act of
    Mar. 26, 1790, ch. 3, §1, 
    1 Stat. 103
    –104. The clerk (or other
    court official) was required “to certify and transmit” the ap-
    plication to the Secretary of State, along with information
    about “the name, age, nation, residence and occupation, for
    the time being, of the alien.” Act of June 18, 1798, §2, 
    1 Stat. 567
    . The clerk also had to register aliens seeking nat-
    uralization and issue certificates confirming the court’s re-
    ceipt of the alien’s request for registration. Act of Apr. 14,
    ——————
    the State to make that choice does not transform the documents into
    something other than a court record.
    Cite as: 
    599 U. S. ____
     (2023)                       27
    Opinion of the Court
    1802, §2, 
    2 Stat. 155
    .8
    Federal law imposed other duties on state courts unre-
    lated to immigration and naturalization. The Judiciary Act
    of 1789, which authorized “any justice of the peace, or other
    magistrate of any of the United States” to arrest and im-
    prison federal offenders, required the judge to set bail at the
    defendant’s request. §33, 
    1 Stat. 91
    . Congress also re-
    quired state courts to administer oaths to prisoners, to issue
    certificates authorizing the apprehension of fugitives, and
    to collect proof of the claims of Canadian refugees who had
    aided the United States in the Revolutionary War. Act of
    May 5, 1792, ch. 29, §2, 
    1 Stat. 266
     (“any person imprisoned
    . . . may have the oath or affirmation herein after expressed
    administered to him by any judge of the United States, or
    of the general or supreme court of law of the state in which
    the debtor is imprisoned”); Act of Feb. 12, 1793, ch. 7, §1, 
    1 Stat. 302
     (“governor or chief magistrate of the state or ter-
    ritory” shall “certif[y] as authentic” an indictment or affida-
    vit charging a “fugitive from justice”); Act of Apr. 7, 1798,
    ——————
    8 Printz noted uncertainty about whether the naturalization laws ap-
    plied only to States that voluntarily “authorized their courts to conduct
    naturalization proceedings.” 
    521 U. S., at
    905–906. But on their face,
    these statutes did not require state consent. See Act of Mar. 26, 1790,
    ch. 3, §1, 
    1 Stat. 103
     (providing that an alien could apply for citizenship
    “to any common law court of record, in any one of the states wherein he
    shall have resided for the term of one year at least”); Act of Apr. 14, 1802,
    ch. 28, 
    2 Stat. 153
     (referring to “the supreme, superior, district or circuit
    court of some one of the states, or of the territorial districts of the United
    States, or a circuit or district court of the United States”). And as Printz
    recognized, this Court has never held that consent is required. 
    521 U. S., at
    905–906; see Holmgren v. United States, 
    217 U. S. 509
    , 517 (1910)
    (holding that Congress could empower state courts to conduct naturali-
    zation proceedings, but because California had already authorized juris-
    diction, reserving the question whether its consent was necessary); but
    see United States v. Jones, 
    109 U. S. 513
    , 520 (1883) (stating in dicta that
    the naturalization laws “could not be enforced” in state court “against
    the consent of the States”). In any event, while the naturalization laws
    are certainly not conclusive evidence, they are nonetheless relevant to
    discerning historical practice.
    28                 HAALAND v. BRACKEEN
    Opinion of the Court
    §3, 
    1 Stat. 548
     (“proof of the several circumstances neces-
    sary to entitle the applicants to the benefits of this act, may
    be taken before . . . a judge of the supreme or superior court,
    or the first justice or first judge of the court of common pleas
    or country court of any state”).
    There is more. Shortly after ratification, Congress
    passed a detailed statute that required state-court judges
    to gather and certify reports. Act of July 20, 1790, §3, 
    1 Stat. 132
    . The Act authorized commanders of ships to re-
    quest examinations of their vessels from any “justice of the
    peace of the city, town or place.” 
    Ibid.
     The judge would
    order three qualified people to prepare a report on the ves-
    sel’s condition, which the judge would review and “endorse.”
    
    Ibid.
     Then, the judge was required to issue an order regard-
    ing “whether the said ship or vessel is fit to proceed on the
    intended voyage; and if not, whether such repairs can be
    made or deficiencies supplied where the ship or vessel then
    lays.” 
    Ibid.
    These early congressional enactments “provid[e] ‘contem-
    poraneous and weighty evidence’ of the Constitution’s
    meaning.” Bowsher v. Synar, 
    478 U. S. 714
    , 723 (1986).
    Collectively, they demonstrate that the Constitution does
    not prohibit the Federal Government from imposing adju-
    dicative tasks on state courts. This makes sense against
    the backdrop of the Madisonian Compromise: Since Article
    III established only the Supreme Court and made inferior
    federal courts optional, Congress could have relied almost
    entirely on state courts to apply federal law. Printz, 
    521 U. S., at 907
    . Had Congress taken that course, it would
    have had to rely on state courts to perform adjudication-
    adjacent tasks too.
    We now confirm what we suggested in Printz: Congress
    may impose ancillary recordkeeping requirements related
    to state-court proceedings without violating the Tenth
    Amendment. Such requirements do not offload the Federal
    Government’s responsibilities onto the States, nor do they
    Cite as: 
    599 U. S. ____
     (2023)             29
    Opinion of the Court
    put state legislatures and executives “under the direct con-
    trol of Congress.” Murphy, 584 U. S., at ___ (slip op., at 18).
    Rather, they are a logical consequence of our system of
    “dual sovereignty” in which state courts are required to ap-
    ply federal law. See Gregory v. Ashcroft, 
    501 U. S. 452
    , 457
    (1991).
    Here, ICWA’s recordkeeping requirements are compara-
    ble in kind and in degree to the historical examples. Like
    the naturalization laws, §1951(a) requires the state court to
    transmit to the Secretary a copy of a court order along with
    basic demographic information. Section 1915(e) likewise
    requires the State to record a limited amount of infor-
    mation—the efforts made to comply with the placement
    preferences—and provide the information to the Secretary
    and to the child’s tribe. These duties are “ancillary” to the
    state court’s obligation to conduct child custody proceedings
    in compliance with ICWA. Printz, 
    521 U. S., at 908, n. 2
    .
    Thus, ICWA’s recordkeeping requirements are consistent
    with the Tenth Amendment.
    IV
    Petitioners raise two additional claims: an equal protec-
    tion challenge to ICWA’s placement preferences and a non-
    delegation challenge to the provision allowing tribes to alter
    the placement preferences. We do not reach the merits of
    these claims because no party before the Court has stand-
    ing to raise them. Article III requires a plaintiff to show
    that she has suffered an injury in fact that is “ ‘fairly trace-
    able to the defendant’s allegedly unlawful conduct and
    likely to be redressed by the requested relief.’ ” California
    v. Texas, 
    593 U. S. ___
    , ___ (2021) (slip op., at 4). Neither
    the individual petitioners nor Texas can pass that test.
    A
    The individual petitioners argue that ICWA injures them
    by placing them on “[un]equal footing” with Indian parents
    30                    HAALAND v. BRACKEEN
    Opinion of the Court
    who seek to adopt or foster an Indian child. Northeastern
    Fla. Chapter, Associated Gen. Contractors of America v.
    Jacksonville, 
    508 U. S. 656
    , 666 (1993). Under ICWA’s hi-
    erarchy of preferences, non-Indian parents are generally
    last in line for potential placements. According to petition-
    ers, this “erects a barrier that makes it more difficult for
    members of one group to obtain a benefit than it is for mem-
    bers of another group.” Ibid.; see also Turner v. Fouche, 
    396 U. S. 346
    , 362 (1970) (the Equal Protection Clause secures
    the right of individuals “to be considered” for government
    positions and benefits “without the burden of invidiously
    discriminatory disqualifications”). The racial discrimina-
    tion they allege counts as an Article III injury.9
    But the individual petitioners have not shown that this
    injury is “likely” to be “redressed by judicial relief.”
    TransUnion LLC v. Ramirez, 
    594 U. S. ___
    , ___ (2021) (slip
    op., at 7). They seek an injunction preventing the federal
    parties from enforcing ICWA and a declaratory judgment
    that the challenged provisions are unconstitutional. Yet
    enjoining the federal parties would not remedy the alleged
    injury, because state courts apply the placement prefer-
    ences, and state agencies carry out the court-ordered place-
    ments. §§1903(1), 1915(a), (b); see also Brief for Individual
    Petitioners 63 (“There is no federal official who administers
    ICWA or carries out its mandates”). The state officials who
    implement ICWA are “not parties to the suit, and there is
    no reason they should be obliged to honor an incidental le-
    gal determination the suit produced.” Lujan v. Defenders
    of Wildlife, 
    504 U. S. 555
    , 569 (1992) (plurality opinion). So
    an injunction would not give petitioners legally enforceable
    ——————
    9 Respondents raise other objections to the individual petitioners’
    standing, including that the alleged injury is speculative because it de-
    pends on future proceedings to foster or adopt Indian children. Brief for
    Tribal Defendants 46–50; Brief for Federal Parties 49–52. Because we
    resolve the standing of all individual petitioners on the ground of re-
    dressability, we do not address respondents’ other arguments.
    Cite as: 
    599 U. S. ____
     (2023)           31
    Opinion of the Court
    protection from the allegedly imminent harm.
    Petitioners’ request for a declaratory judgment suffers
    from the same flaw. See Skelly Oil Co. v. Phillips Petroleum
    Co., 
    339 U. S. 667
    , 671–672 (1950). This form of relief con-
    clusively resolves “ ‘the legal rights of the parties.’ ” Med-
    tronic, Inc. v. Mirowski Family Ventures, LLC, 
    571 U. S. 191
    , 200 (2014) (emphasis added). But again, state officials
    are nonparties who would not be bound by the judgment.
    Taylor v. Sturgell, 
    553 U. S. 880
    , 892–893 (2008). Thus, the
    equal protection issue would not be settled between peti-
    tioners and the officials who matter—which would leave the
    declaratory judgment powerless to remedy the alleged
    harm. 994 F. 3d, at 448 (Costa, J., concurring in part and
    dissenting in part) (“What saves proper declaratory judg-
    ments from a redressability problem—but is lacking here—
    is that they have preclusive effect on a traditional lawsuit
    that is imminent”). After all, the point of a declaratory
    judgment “is to establish a binding adjudication that ena-
    bles the parties to enjoy the benefits of reliance and repose
    secured by res judicata.” 18A C. Wright, A. Miller, & E.
    Cooper, Federal Practice and Procedure §4446 (3d ed. Supp.
    2022). Without preclusive effect, a declaratory judgment is
    little more than an advisory opinion. Ibid.; see Public Serv.
    Comm’n of Utah v. Wycoff Co., 
    344 U. S. 237
    , 242–243
    (1952).
    The individual petitioners do not dispute—or even ad-
    dress—any of this. Instead, they insist that state courts are
    likely to defer to a federal court’s interpretation of federal
    law, thus giving rise to a substantial likelihood that a fa-
    vorable judgment will redress their injury. Brief in Oppo-
    sition for Individual Respondents 19–20; Reply Brief for In-
    dividual Petitioners 29. They point out that, in the
    Brackeens’ ongoing efforts to adopt Y. R. J., the trial court
    stated that it would follow the federal court’s ruling on the
    Brackeens’ constitutional claims. 
    Ibid.
     Thus, they reason,
    winning this case would solve their problems.
    32                     HAALAND v. BRACKEEN
    Opinion of the Court
    But “[r]edressability requires that the court be able to af-
    ford relief through the exercise of its power, not through the
    persuasive or even awe-inspiring effect of the opinion ex-
    plaining the exercise of its power.” Franklin v. Massachu-
    setts, 
    505 U. S. 788
    , 825 (1992) (Scalia, J., concurring in
    part and concurring in judgment) (emphasis in original);
    see also United States v. Juvenile Male, 
    564 U. S. 932
    , 937
    (2011) (per curiam) (a judgment’s “possible, indirect benefit
    in a future lawsuit” does not preserve standing). Other-
    wise, redressability would be satisfied whenever a decision
    might persuade actors who are not before the court—con-
    trary to Article III’s strict prohibition on “issuing advisory
    opinions.” Carney v. Adams, 
    592 U. S. ___
    , ___ (2020) (slip
    op., at 4). It is a federal court’s judgment, not its opinion,
    that remedies an injury; thus it is the judgment, not the
    opinion, that demonstrates redressability. The individual
    petitioners can hope for nothing more than an opinion, so
    they cannot satisfy Article III.10
    B
    Texas also lacks standing to challenge the placement
    preferences. It has no equal protection rights of its own,
    South Carolina v. Katzenbach, 
    383 U. S. 301
    , 323 (1966),
    and it cannot assert equal protection claims on behalf of its
    citizens because “[a] State does not have standing as parens
    patriae to bring an action against the Federal Government,”
    Alfred L. Snapp & Son, Inc. v. Puerto Rico ex rel. Barez, 
    458 U. S. 592
    , 610, n. 16 (1982).11 That should make the issue
    ——————
    10 Of course, the individual petitioners can challenge ICWA’s constitu-
    tionality in state court, as the Brackeens have done in their adoption
    proceedings for Y. R. J. 
    994 F. 3d 249
    , 294 (2021) (principal opinion of
    Dennis, J.).
    11 Texas claims that it can assert third-party standing on behalf of non-
    Indian families. This argument is a thinly veiled attempt to circumvent
    the limits on parens patriae standing. The case on which Texas relies,
    Georgia v. McCollum, 
    505 U. S. 42
     (1992), allowed a State to represent
    Cite as: 
    599 U. S. ____
     (2023)                    33
    Opinion of the Court
    open and shut.
    Yet Texas advances a few creative arguments for why it
    has standing despite these settled rules. It leads with what
    one might call an “unclean hands” injury: ICWA “injures
    Texas by requiring it to break its promise to its citizens that
    it will be colorblind in child-custody proceedings.” Reply
    Brief for Texas 15; 
    id., at 14
     (“ICWA forces Texas to violate
    its own constitutional obligations”). This is not the kind of
    “concrete” and “particularized” “invasion of a legally pro-
    tected interest” necessary to demonstrate an “ ‘injury in
    fact.’ ” Lujan, 
    504 U. S., at 560
    . Were it otherwise, a State
    would always have standing to bring constitutional chal-
    lenges when it is complicit in enforcing federal law. Texas
    tries to finesse this problem by characterizing ICWA as a
    “fiscal trap,” forcing it to discriminate against its citizens or
    lose federal funds. Brief for Petitioner Texas 39–40. But
    ICWA is not a Spending Clause statute—Texas bases this
    argument on a vague reference to a different Spending
    Clause statute that it does not challenge. And Texas has
    not established that those funds, which the State has ac-
    cepted for years, are conditioned on compliance with the
    placement preferences anyway. See 
    42 U. S. C. §622
    ; Brief
    for Federal Parties 49, n. 6.
    Texas also claims a direct pocketbook injury associated
    with the costs of keeping records, providing notice in invol-
    untary proceedings, and producing expert testimony before
    moving a child to foster care or terminating parental rights.
    Reply Brief for Texas 13–14. But these alleged costs are not
    ——————
    jurors struck on the basis of race, because (among other reasons) “[a]s
    the representative of all its citizens, the State is the logical and proper
    party to assert the invasion of the constitutional rights of the excluded
    jurors in a criminal trial.” 
    Id., at 56
    . But McCollum was not a suit
    against the Federal Government; moreover, it involved a “concrete in-
    jury” to the State and “some hindrance to the third party’s ability to pro-
    tect its own interests,” neither of which is present here. 
    Id.,
     at 55–56.
    34                    HAALAND v. BRACKEEN
    Opinion of the Court
    “fairly traceable” to the placement preferences, which “op-
    erate independently” of the provisions Texas identifies.
    California, 593 U. S., at ___ (slip op., at 15). The provisions
    do not rise or fall together; proving that the placement pref-
    erences are unconstitutional “would not show that enforce-
    ment of any of these other provisions violates the Constitu-
    tion.” Ibid. In other words, Texas would continue to incur
    the complained-of costs even if it were relieved of the duty
    to apply the placement preferences. The former, then, can-
    not justify a challenge to the latter.
    Because Texas is not injured by the placement prefer-
    ences, neither would it be injured by a tribal resolution that
    altered those preferences pursuant to §1915(c). Texas
    therefore does not have standing to bring either its equal
    protection or its nondelegation claims.12
    *     *     *
    For these reasons, we affirm the judgment of the Court of
    Appeals regarding Congress’s constitutional authority to
    enact ICWA. On the anticommandeering claims, we re-
    verse. On the equal protection and nondelegation claims,
    we vacate the judgment of the Court of Appeals and remand
    with instructions to dismiss for lack of jurisdiction.
    It is so ordered.
    ——————
    12 Although the individual petitioners join Texas’s nondelegation chal-
    lenge to §1915(c), they raise no independent arguments about why they
    would have standing to bring this claim. Brief for Individual Petitioners
    41, n. 6; Brief for Federal Parties 79, n. 14.
    Cite as: 
    599 U. S. ____
     (2023)            1
    GORSUCH, J., concurring
    SUPREME COURT OF THE UNITED STATES
    _________________
    Nos. 21–376, 21–377, 21–378 and 21–380
    _________________
    DEB HAALAND, SECRETARY OF THE INTERIOR,
    ET AL., PETITIONERS
    21–376                 v.
    CHAD EVERET BRACKEEN, ET AL.
    CHEROKEE NATION, ET AL., PETITIONERS
    21–377              v.
    CHAD EVERET BRACKEEN, ET AL.
    TEXAS, PETITIONER
    21–378                 v.
    DEB HAALAND, SECRETARY OF THE
    INTERIOR, ET AL.
    CHAD EVERET BRACKEEN, ET AL., PETITIONERS
    21–380               v.
    DEB HAALAND, SECRETARY OF THE
    INTERIOR, ET AL.
    ON WRITS OF CERTIORARI TO THE UNITED STATES COURT OF
    APPEALS FOR THE FIFTH CIRCUIT
    [June 15, 2023]
    JUSTICE GORSUCH, with whom JUSTICE SOTOMAYOR and
    JUSTICE JACKSON join as to Parts I and III, concurring.
    In affirming the constitutionality of the Indian Child
    Welfare Act (ICWA), the Court safeguards the ability of
    tribal members to raise their children free from interfer-
    ence by state authorities and other outside parties. In the
    process, the Court also goes a long way toward restoring the
    2                  HAALAND v. BRACKEEN
    GORSUCH, J., concurring
    original balance between federal, state, and tribal powers
    the Constitution envisioned. I am pleased to join the
    Court’s opinion in full. I write separately to add some his-
    torical context. To appreciate fully the significance of to-
    day’s decision requires an understanding of the long line of
    policies that drove Congress to adopt ICWA. And to appre-
    ciate why that law surely comports with the Constitution
    requires a bird’s-eye view of how our founding document
    mediates between competing federal, state, and tribal
    claims of sovereignty.
    I
    The Indian Child Welfare Act did not emerge from a vac-
    uum. It came as a direct response to the mass removal of
    Indian children from their families during the 1950s, 1960s,
    and 1970s by state officials and private parties. That prac-
    tice, in turn, was only the latest iteration of a much older
    policy of removing Indian children from their families—one
    initially spearheaded by federal officials with the aid of
    their state counterparts nearly 150 years ago. In all its
    many forms, the dissolution of the Indian family has had
    devastating effects on children and parents alike. It has
    also presented an existential threat to the continued vital-
    ity of Tribes—something many federal and state officials
    over the years saw as a feature, not as a flaw. This is the
    story of ICWA. And with this story, it pays to start at the
    beginning.
    A
    When Native American Tribes were forced onto reserva-
    tions, they understood that life would never again be as it
    was. M. Fletcher & W. Singel, Indian Children and the Fed-
    eral–Tribal Trust Relationship, 
    95 Neb. L. Rev. 885
    , 917–
    918 (2017) (Fletcher & Singel). Securing a foothold for their
    children in a rapidly changing world, the Tribes knew,
    would require schooling. 
    Ibid.
     So as they ceded their lands,
    Cite as: 
    599 U. S. ____
     (2023)            3
    GORSUCH, J., concurring
    Tribes also negotiated “more than 150” treaties with the
    United States that included “education-related provisions.”
    Dept. of Interior, B. Newland, Federal Indian Boarding
    School Initiative Investigative Report 33 (May 2022) (BIA
    Report). Many tribal leaders hoped these provisions would
    lead to the creation of “reservation Indian schools that
    would blend traditional Indian education with the needed
    non-Indian skills that would allow their members to adapt
    to the reservation way of life.” R. Cross, American Indian
    Education: The Terror of History and the Nation’s Debt to
    the Indian Peoples, 
    21 U. Ark. Little Rock L. Rev. 941
    , 950
    (1999).
    At first, Indian education typically came in the form of
    day schools, many of them “established through the . . . ef-
    forts of missionaries or the wives of Army officers stationed
    at military reservations in the Indian country.” Annual Re-
    port of the Commissioner of Indian Affairs to the Secretary
    of Interior, p. LXI (1886) (ARCIA 1886). At those day
    schools, “Indian children would learn English as a second
    language,” along with “math and science.” Fletcher &
    Singel 917–918. But the children lived at home with their
    families where they could continue to learn and practice
    “their languages, beliefs, and traditional knowledge.” 
    Id., at 918
    . At least in those “early decades,” schooling was
    “generally . . . not compulsory” anyway. 
    Id., at 914
    .
    The federal government had darker designs. By the late
    1870s, its goals turned toward destroying tribal identity
    and assimilating Indians into broader society. See L.
    Lacey, The White Man’s Law and the American Indian
    Family in the Assimilation Era, 
    40 Ark. L. Rev. 327
    , 356–
    357 (1986). Achieving those goals, officials reasoned, re-
    quired the “complete isolation of the Indian child from his
    savage antecedents.” ARCIA 1886, at LXI. And because
    “the warm reciprocal affection existing between parents
    and children” was “among the strongest characteristics of
    4                  HAALAND v. BRACKEEN
    GORSUCH, J., concurring
    the Indian nature,” officials set out to eliminate it by dis-
    solving Indian families. Annual Report of the Commis-
    sioner of Indian Affairs to the Secretary of Interior 392
    (1904).
    Thus began Indian boarding schools. In 1879, the Car-
    lisle Indian Industrial School opened its doors at the site of
    an old military base in central Pennsylvania. Carlisle’s
    head, then-Captain Richard Henry Pratt, summarized the
    school’s mission this way: “[A]ll the Indian there is in the
    race should be dead. Kill the Indian in him, and save the
    man.” The Advantages of Mingling Indians With Whites,
    in Proceedings of the National Conference of Charities and
    Correction 46 (I. Barrows ed. 1892). From its inception,
    Carlisle depended on state support. The school “was deeply
    enmeshed with local governments and their services,” and
    it was “expanded thanks to the Pennsylvania Legislature.”
    Brief for American Historical Association et al. as Amici
    Curiae 11 (Historians Brief ). Ultimately, Carlisle became
    the model for what would become a system of 408 similar
    federal institutions nationwide. BIA Report 82. “The es-
    sential feature” of each was, in the federal government’s
    own words, “the abolition of the old tribal relations.” An-
    nual Report of the Commissioner of Indian Affairs to the
    Secretary of Interior 28 (1910).
    Unsurprisingly, “[m]any Indian families resisted” the
    federal government’s boarding school initiative and “re-
    fus[ed] to send their children.” S. Rep. No. 91–501, pt. 1,
    p. 12 (1969). But Congress would not be denied. It author-
    ized the Secretary of the Interior to “prevent the issuing of
    rations or the furnishing of subsistence” to Indian families
    who would not surrender their children. Act of Mar. 3,
    1893, 
    27 Stat. 628
    , 635; see also, e.g., Act of Feb. 14, 1920,
    
    41 Stat. 410
    . When economic coercion failed, officials some-
    times resorted to abduction. See BIA Report 36. As one
    official later recounted, officers would “visit the [Indian]
    camps unexpectedly with a detachment of [officers], and
    Cite as: 
    599 U. S. ____
     (2023)            5
    GORSUCH, J., concurring
    seize such children as were proper and take them away to
    school, willing or unwilling.” ARCIA 1886, at 199. When
    parents “hurried their children off to the mountains or hid
    them away in camp,” agents “chase[d] and capture[d] them
    like so many wild rabbits.” 
    Ibid.
     Fathers were described
    as “sullen,” mothers “loud in their lamentations,” and the
    children “almost out of their wits with fright.” 
    Ibid.
    Upon the children’s arrival, the boarding schools would
    often seek to strip them of nearly every aspect of their iden-
    tity. The schools would take away their Indian names and
    give them English ones. See BIA Report 53. The schools
    would cut their hair—a point of shame in many native com-
    munities, see J. Reyhner & J. Eder, American Indian Edu-
    cation 178 (2004)—and confiscate their traditional clothes.
    ARCIA 1886, at 199. Administrators delighted in the pro-
    cess, describing the “metamorphosis [a]s wonderful,” and
    professing that, in the main, “the little savage seems quite
    proud of his appearance.” 
    Ibid.
     After intake, the schools
    frequently prohibited children from speaking their native
    language or engaging in customary cultural or religious
    practices. BIA Report 53. Nor could children freely associ-
    ate with members of their own Tribe. Schools would organ-
    ize dorms by the “[s]ize of cadets, and not their tribal rela-
    tions,” so as to further “br[eak] up tribal associations.”
    ARCIA 1886, at 6.
    Resistance could invite punishments that included “with-
    holding food” and “whipping.” BIA Report 54 (internal quo-
    tation marks omitted). Older boys faced “court-martial,”
    with other Indian children serving as prosecutors and
    judges. Annual Report of the Commissioner of Indian Af-
    fairs to the Secretary of Interior 188 (1881). Even compli-
    ant students faced “[r]ampant physical, sexual, and emo-
    tional abuse; disease; malnourishment; overcrowding; and
    lack of health care.” BIA Report 56. Given these conditions,
    it is unsurprising that many children tried (often unsuc-
    cessfully) to flee. 
    Id., at 55, n. 176
     (recounting incidents).
    6                  HAALAND v. BRACKEEN
    GORSUCH, J., concurring
    State officials played a key role in foiling those efforts.
    “[P]olice from a variety of jurisdictions” assisted in “cap-
    tur[ing] and return[ing] runaway school children.” Histori-
    ans Brief 11–12. For “the runaways,” school administrators
    believed “a whipping administered soundly and prayer-
    fully, helps greatly towards bringing about the desired re-
    sult.” BIA Report 55 (internal quotation marks omitted).
    As one Commissioner of Indian Affairs put it, while “[t]he
    first wild redskin placed in the school[s] chafes at the loss
    of freedom and longs to return to his wildwood home,” that
    resistance would fade “with each successive generation,”
    leaving a “greater desir[e] to be in touch with the dominant
    race.” 
    Id.,
     at 51–52 (internal quotation marks omitted).
    Adding insult to injury, the United States stuck Tribes
    with a bill for these programs. At points, as much as 95%
    of the funding for Indian boarding schools came from “In-
    dian trust fund monies” raised by selling Indian land. 
    Id., at 44
    . To subsidize operations further, the boarding schools
    frequently required children not even 12 years old to work
    on the grounds. 
    Id.,
     at 62–63. Some rationalized this expe-
    rience as a benefit to the children. 
    Id.,
     at 59–63. But in
    candor, Indian boarding schools “could not possibly be
    maintained . . . were it not for the fact that students [were]
    required to do . . . an amount of labor that ha[d] in the ag-
    gregate a very appreciable monetary value.” L. Meriam, In-
    stitute for Government Research, The Problem of Indian
    Administration 376 (1928) (Meriam Report).
    To lower costs further and promote assimilation, some
    schools created an “outing system,” which sent Indian chil-
    dren to live “with white families” and perform “household
    and farm chores” for them. R. Trennert, From Carlisle to
    Phoenix: The Rise and Fall of the Indian Outing System,
    1878–1930, 52 Pacific Hist. Rev. 267, 273 (1983). This pro-
    gram took many Indian children “even further from their
    homes, families, and cultures.” Fletcher & Singel 943. Ad-
    vocates of the outing system hoped it would be “extended
    Cite as: 
    599 U. S. ____
     (2023)              7
    GORSUCH, J., concurring
    until every Indian child was in a white home.” D. Otis, The
    Dawes Act and the Allotment of Indian Lands 68 (1973). In
    some respects, outing-system advocates were ahead of their
    time. The program they devised laid the groundwork for
    the system of mass adoption that, as we shall see, eventu-
    ally moved Congress to enact ICWA many decades later.
    In 1928, the Meriam Report, prepared by the Brookings
    Institution, examined conditions in the Indian boarding
    schools. It found, “frankly and unequivocally,” that “the
    provisions for the care of the Indian children . . . are grossly
    inadequate.” Meriam Report 11. It recommended that the
    federal government “accelerat[e]” the “mov[e] away from
    the boarding school” system in favor of “day school or public
    school facilities.” 
    Id., at 35
    . That transition would be slow
    to materialize, though. As late as 1971, federal boarding
    schools continued to house “more than 17 per cent of the
    Indian school-age population.” W. Byler, The Destruction
    of American Indian Families 1 (S. Unger ed. 1977) (AAIA
    Report).
    B
    The transition away from boarding schools was not the
    end of efforts to remove Indian children from their families
    and Tribes; more nearly, it was the end of the beginning.
    As federal boarding schools closed their doors and Indian
    children returned to the reservations, States with signifi-
    cant Native American populations found themselves facing
    significant new educational and welfare responsibilities.
    Historians Brief 13–18. Around this time, as fate would
    have it, “shifting racial ideologies and changing gender
    norms [had] led to an increased demand for Indian chil-
    dren” by adoptive couples. M. Jacobs, Remembering the
    “Forgotten Child”: The American Indian Child Welfare Cri-
    sis of the 1960s and 1970s, 37 Am. Indian Q. 136, 141
    (2013). Certain States saw in this shift an opportunity.
    They could “save . . . money” by “promoting the adoption of
    8                  HAALAND v. BRACKEEN
    GORSUCH, J., concurring
    Indian children by private families.” 
    Id., at 153
    .
    This restarted a now-familiar nightmare for Indian fam-
    ilies. The same assimilationist rhetoric previously invoked
    by the federal government persisted, “voiced this time by
    state and county officials.” L. George, Why the Need for the
    Indian Child Welfare Act?, 5 J. of Multicultural Social Work
    165, 169 (1997). “ ‘If you want to solve the Indian problem
    you can do it in one generation,’ ” one official put it. 
    Ibid.
    “ ‘You can take all of [the] children of school age and move
    them bodily out of the Indian country and transport them
    to some other part of the United States.’ ” 
    Ibid.
     This would
    allow “ ‘civilized people’ ” to raise the children, instead of
    their families or their tribal communities. 
    Ibid.
    In this respect, “[t]he removal of Indian children by
    [S]tates ha[d] much in common with Indian boarding
    schools.” Fletcher & Singel 952. Through the 1960s and
    1970s, Indian-child removal reached new heights. Surveys
    conducted in 1969 and 1974 showed that “approximately
    25–35 per cent of all Indian children [were] separated from
    their families.” AAIA Report 1. Often, these removals
    whisked children not only out of their families but out of
    their communities. Some estimate that “more than 90 per
    cent of non-related adoptions of Indian children [were]
    made by non-Indian couples.” 
    Id., at 2
    .
    These family separations frequently lacked justification.
    According to one report, only about “1 per cent” of the sepa-
    rations studied involved alleged physical abuse. 
    Ibid.
     The
    other 99 percent? “[V]ague grounds” such “as ‘neglect’ or
    ‘social deprivation.’ ” 
    Ibid.
     These determinations, often
    “wholly inappropriate in the context of Indian family life,”
    came mainly from non-Indian social workers, many of
    whom were “ignorant of Indian cultural values and social
    norms.” 
    Id.,
     at 2–3. They routinely penalized Indian par-
    ents for conditions of “[p]overty, poor housing, lack of mod-
    ern plumbing, and overcrowding.” 
    Id., at 3
    . One 3-year-old
    Sioux child, for instance, was removed from her family on
    Cite as: 
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     (2023)              9
    GORSUCH, J., concurring
    the State’s “belief that an Indian reservation is an unsuita-
    ble environment for a child.” 
    Ibid.
     So it was that some In-
    dian families, “forced onto reservations at gunpoint,” were
    later “told that they live[d] in a place unfit for raising their
    children.” 
    Id.,
     at 3–4.
    Aggravating matters, these separations were frequently
    “carried out without due process of law.” 
    Id., at 4
    . Children
    and their parents rarely had counsel. 
    Ibid.
     For that mat-
    ter, few cases saw the inside of a courtroom. Welfare de-
    partments knew that they could threaten to withhold ben-
    efit payments if Indian parents did not surrender custody.
    
    Id.,
     at 4–5. Nor were threats always necessary. After all
    the Tribes had suffered at the government’s hands, many
    parents simply believed they had no power to resist. 
    Ibid.
    One interviewed mother “wept that she did not dare protest
    the taking of her children for fear of going to jail.” 
    Id., at 7
    .
    For those Indian parents who did resist, “simple abduction”
    remained an option. 
    Id., at 5
    . Parents were, for instance,
    sometimes tricked into signing forms that they believed au-
    thorized only a brief removal of their children. 
    Ibid.
     Only
    later would they discover that the forms purported to sur-
    render full custody. 
    Ibid.
    Like the boarding school system that preceded it, this
    new program of removal had often-disastrous conse-
    quences. “Because the family is the most fundamental eco-
    nomic, educational, and health-care unit” in society, these
    “assaults on Indian families” contributed to the precarious
    conditions that Indian parents and children already faced.
    
    Id.,
     at 7–8. Many parents came to “feel hopeless, powerless,
    and unworthy”—further feeding the cycle of removal. 
    Id., at 8
    . For many children, separation from their families
    caused “severe distress” that “interfere[d] with their physi-
    cal, mental, and social growth and development.” 
    Ibid.
     It
    appears, too, that Indian children were “significantly more
    likely” to experience “physical, sexual, [and] emotional”
    10                HAALAND v. BRACKEEN
    GORSUCH, J., concurring
    abuse in foster and adoptive homes than their white coun-
    terparts. A. Landers, S. Danes, A. Campbell, & S. White
    Hawk, Abuse After Abuse: The Recurrent Maltreatment of
    American Indian Children in Foster Care and Adoption,
    111 Child Abuse & Neglect 104805, p. 9 (2021).
    All that often translated into long-lasting adverse health
    and emotional effects. See M. Yellow Horse Brave Heart,
    The Historical Trauma Response Among Natives and Its
    Relationship with Substance Abuse: A Lakota Illustration,
    35 J. of Psychoactive Drugs 1, 7–13 (2003); U. Running Bear
    et al., The Impact of Individual and Parental American In-
    dian Boarding School Attendance on Chronic Physical
    Health of Northern Plains Tribes, 42 Family & Community
    Health 1, 3–7 (2019). As one study warned: “[E]fforts to
    make Indian children ‘white,’ ” by removing them from their
    Tribes, “can destroy them.” AAIA Report 9.
    C
    Eventually, Congress could ignore the problem no longer.
    In 1978, it responded with the Indian Child Welfare Act. 
    92 Stat. 3096
    . The statute’s findings show that Congress was
    acutely aware of the scope of the crisis. “[A]n alarmingly
    high percentage of Indian families,” Congress observed,
    were being “broken up by the removal, often unwarranted,
    of their children from them by nontribal [state] public and
    private agencies.” 
    25 U. S. C. §1901
    (4). And “an alarmingly
    high percentage of such children” were “placed in non-
    Indian foster and adoptive homes and institutions.” 
    Ibid.
    Removal at that scale threatened the “continued existence
    and integrity of Indian [T]ribes.” §1901(3).
    The statute Congress settled upon contains various pro-
    visions aimed at addressing this crisis. At bottom, though,
    the law’s operation is simple. It installs substantive and
    procedural guardrails against the unjustified termination
    of parental rights and removal of Indian children from
    tribal life.
    Cite as: 
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     (2023)            11
    GORSUCH, J., concurring
    The touchstone of the statute is notice. In any involun-
    tary removal proceeding involving an Indian child, the ini-
    tiating party must inform (1) the parent or custodian; and
    (2) the child’s Tribe. §1912(a). Either or both can intervene.
    §1911(c). ICWA also makes it harder for the moving party
    to win an involuntary removal proceeding. The party must
    show that “active efforts” have been made to avoid remov-
    ing the Indian child. §1912(d). It must show the status quo
    is “likely to result in serious emotional or physical damage
    to the child.” §1912(e), (f ). And it must prove that fact by
    “clear and convincing evidence,” §1912(e) (for placement in
    foster services), or “beyond a reasonable doubt,” §1912(f )
    (for termination of parental rights).
    Even when it comes to voluntary removal proceedings,
    ICWA sets certain “minimum Federal standards” for “the
    placement of [Indian] children in foster or adoptive homes.”
    §1902. In any adoptive placement, a court by default must
    give preference to “(1) a member of the child’s extended fam-
    ily; (2) other members of the Indian child’s [T]ribe; or (3)
    other Indian families.” §1915(a). This priority governs un-
    less the initiating party can show “good cause.” Ibid. A
    similar regime applies by default to foster-care or pre-
    adoptive placements. §1915(b). But note that “by default.”
    ICWA gives Tribes a voice. It allows them to establish a
    “different order of preference by resolution,” provided it is
    “the least restrictive setting appropriate to the particular
    needs of the child.” §1915(c).
    Recognizing that coercion remains possible even with
    these protections, ICWA also allows for postplacement re-
    lief. It lets the Indian child, the parent, or the Tribe “peti-
    tion any court of competent jurisdiction” to “invalidate” an
    order that violated key provisions of ICWA. §1914. Of spe-
    cial relevance, an Indian parent consenting to adoption has
    two years to withdraw consent on “the grounds that consent
    was obtained through fraud or duress.” §1913(d).
    ICWA is not a panacea. While “[a]dopting ICWA marked
    12                 HAALAND v. BRACKEEN
    GORSUCH, J., concurring
    one step toward upholding tribal rights,” “many [S]tates”
    have struggled with “effective implementation.” Maine Wa-
    banaki–State Child Welfare Truth & Reconciliation Com-
    mission, Beyond the Mandate: Continuing the Conversa-
    tion 12 (2015). Others resist ICWA outright, as the present
    litigation by Texas attests. See generally M. Fletcher & W.
    Singel, Lawyering the Indian Child Welfare Act, 
    120 Mich. L. Rev. 1755
     (2022). Still, the statute “has achieved consid-
    erable success in stemming unwarranted removals by state
    officials of Indian children from their families and commu-
    nities.” B. Atwood, Flashpoints Under the Indian Child
    Welfare Act: Toward a New Understanding of State Court
    Resistance, 51 Emory L. J. 587, 621 (2002). And consider-
    able research “[s]ubsequent to Congress’s enactment of
    ICWA” has “borne out the statute’s basic premise”—that
    “[i]t is generally in the best interests of Indian children to
    be raised in Indian homes.” Brief for American Psychologi-
    cal Association et al. as Amici Curiae 10–24.
    II
    This history leads us to the question at the heart of to-
    day’s cases: Did Congress lack the constitutional authority
    to enact ICWA, as Texas and the private plaintiffs contend?
    In truth, that is not one question, but many. What author-
    ities do the Tribes possess under our Constitution? What
    power does Congress have with respect to tribal relations?
    What does that mean for States? And how do those princi-
    ples apply in a context like adoption, which involves com-
    peting claims of federal, state, and tribal authority?
    Answering these questions requires a full view of the
    Indian-law bargain struck in our Constitution. Under the
    terms of that bargain, Indian Tribes remain independent
    sovereigns with the exclusive power to manage their inter-
    nal matters. As a corollary of that sovereignty, States have
    virtually no role to play when it comes to Indian affairs. To
    preserve this equilibrium between Tribes and States, the
    Cite as: 
    599 U. S. ____
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    GORSUCH, J., concurring
    Constitution vests in the federal government a set of potent
    (but limited and enumerated) powers. In particular, the In-
    dian Commerce Clause gives Congress a robust (but not ple-
    nary) power to regulate the ways in which non-Indians may
    interact with Indians. To understand each of those pieces—
    and how they fit together—is to understand why the Indian
    Child Welfare Act must survive today’s legal challenge.
    This is all much more straightforward than it sounds.
    Take each piece of the puzzle in turn. Then, with the full
    constitutional picture assembled, return to ICWA’s provi-
    sions. By then, you will have all you need to see why the
    Court upholds the law.
    A
    Start with the question how our Constitution approaches
    tribal sovereignty. In the years before Jamestown, Indian
    Tribes existed as “self-governing sovereign political commu-
    nities.” United States v. Wheeler, 
    435 U. S. 313
    , 322–323
    (1978). They employed “sophisticated governmental mod-
    els,” formed “[c]onfederacies” with one another, and often
    engaged in decisionmaking by “consensual agreement.” 1
    B. Pritzker, Native Americans: An Encyclopedia of History,
    Culture, and Peoples xii (1998).
    When the British crossed the Atlantic, they brought with
    them their own legal understandings. A seasoned colonial
    power, Britain was no stranger to the idea of “tributary”
    and “feudatory” states. E. de Vattel, Law of Nations 60–61
    (1805) (Vattel). And it was a long-held tenet of interna-
    tional law that such entities do not “cease to be sovereign
    and independent” even when subject to military conquest—
    at least not “so long as self government and sovereign and
    independent authority are left in the[ir] administration.”
    Worcester v. Georgia, 
    6 Pet. 515
    , 561 (1832). For that rea-
    son, early “history furnishes no example, from the first set-
    tlement of our country, of any attempt on the part of the
    14                HAALAND v. BRACKEEN
    GORSUCH, J., concurring
    [C]rown to interfere with the internal affairs of the Indi-
    ans.” 
    Id., at 547
    ; see also Vattel 60. Instead, the “settled
    state of things” reflected the British view that Tribes were
    “nations capable of maintaining the relations of peace and
    war; [and] of governing themselves.” 
    6 Pet., at
    548–549.
    Consistent with that understanding, the British regarded
    “the Indians as owners of their land.” S. Banner, How the
    Indians Lost Their Land: Law and Power on the Frontier
    12 (2005). Britain often purchased land from Tribes (at
    least nominally) and predicated its system of legal title on
    those purchases. 
    Ibid.
     The Crown entered into all manner
    of treaties with the Tribes too—just as it did with fellow
    European powers. See, e.g., Letter from Gov. Burnet to
    Lords of Trade, Nov. 21, 1722, concerning the Great Treaty
    of 1722 Between the Five Nations, the Mahicans, and the
    Colonies of New York, Virginia, and Pennsylvania, in 5 Doc-
    uments Relative to the Colonial History of the State of New
    York 655–681 (E. O’Callaghan ed. 1955); Deed in Trust
    From Three of the Five Nations of Indians to the King in
    1726, in 
    id.,
     at 800–801; A Treaty Held at the Town of Lan-
    caster with the Indians of the Six Nations in 1744, in Indian
    Treaties, Printed by Benjamin Franklin, 1736–1762,
    pp. 43–49 (1938).
    Ultimately, “the American Revolution replaced that legal
    framework with a similar one.” Oklahoma v. Castro-
    Huerta, 
    597 U. S. ___
    , ___ (2022) (GORSUCH, J., dissenting)
    (slip op., at 2). The newly independent Nation wasted no
    time entering into treaties of its own—in no small part to
    secure its continued existence against external threats.
    See, e.g., Articles of Agreement and Confederation, Sept.
    17, 1778, 
    7 Stat. 13
    . In practice, too, “[t]he new Republic”
    broadly recognized “the sovereignty of Indian [T]ribes,”
    even if it did so “sometimes grudgingly.” W. Quinn, Federal
    Acknowledgment of American Indian Tribes: The Histori-
    cal Development of a Legal Concept, 34 Am. J. L. Hist. 331,
    337 (1990). As we will see, the period under the Articles of
    Cite as: 
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    GORSUCH, J., concurring
    Confederation was marred by significant conflict, driven by
    state and individual intrusions on tribal land. But the Con-
    stitution that followed reflected an understanding that
    Tribes enjoy a power to rule themselves that no other gov-
    ernmental body—state or federal—may usurp.
    Several constitutional provisions prove the point. One
    sure tell is the federal government’s treaty power. See
    Art. II, §2, cl. 2. Because the United States “adopted and
    sanctioned the previous treaties with the Indian nations,
    [it] consequently admit[ted the Tribes’] rank among those
    powers who are capable of making treaties.” Worcester, 
    6 Pet., at 559
    . Similarly, the Commerce Clause vests in Con-
    gress the power to “regulate Commerce with foreign Na-
    tions,” “among the several States,” and “with the Indian
    Tribes,” Art. I, §8, cl. 3—conferrals of authority with respect
    to three separate sorts of sovereign entities that do not en-
    tail the power to eliminate any of them. Even beyond that,
    the Constitution exempts from the apportionment calculus
    “Indians not taxed.” §2, cl. 3. This formula “ratified the
    legal treatment of tribal Indians [even] within the [S]tates
    as separate and sovereign peoples, who were simply not
    part of the state polities.” R. Clinton, The Dormant Indian
    Commerce Clause, 
    27 Conn. L. Rev. 1055
    , 1150 (1995)
    (Clinton 1995). (The Fourteenth Amendment would later
    reprise this language, Amdt. 14, §2, confirming both the en-
    during sovereignty of Tribes and the bedrock principle that
    Indian status is a “political rather than racial” classifica-
    tion, Morton v. Mancari, 
    417 U. S. 535
    , 553, n. 24 (1974).)
    Given these express provisions, the early conduct of the
    political branches comes as little surprise. From the begin-
    ning, the “Washington Administration acknowledged con-
    siderable Native autonomy.” G. Ablavsky, Beyond the In-
    dian Commerce Clause, 124 Yale L. J. 1012, 1067 (2015)
    (Ablavsky 2015). Henry Knox, President Washington’s Sec-
    retary of War, described the Tribes as akin to “foreign na-
    tions, not as the subjects of any particular [S]tate.” Letter
    16                 HAALAND v. BRACKEEN
    GORSUCH, J., concurring
    to G. Washington (July 7, 1789), in 3 Papers of George
    Washington: Presidential Series 134–141 (D. Twohig ed.
    1989). Thomas Jefferson spoke of them as maintaining
    “full, undivided, and independent sovereignty as long as
    they chose to keep it,” commenting also “that this might be
    for ever.” Notes on Cabinet Opinions (Feb. 26, 1793), in 25
    Papers of Thomas Jefferson 271–272 (J. Catanzariti ed.
    1992). This view would later feature in a formal opinion of
    the Attorney General, who explained that, “[s]o long as a
    [T]ribe exists . . . its title and possession are sovereign and
    exclusive; and there exists no authority to enter upon their
    lands, for any purpose whatever, without their consent.” 1
    Op. Atty. Gen. 465, 466 (1821).
    What went for the Executive went for Congress. In the
    first few decades of the Nation’s existence, the Legislative
    Branch passed a battery of statutes known as the Indian
    Trade and Intercourse Acts. See, e.g., Act of July 22, 1790,
    ch. 33, 
    1 Stat. 137
    ; Act of Mar. 1, 1793, ch. 19, 
    1 Stat. 329
    ;
    Act of May 19, 1796, ch. 30, 
    1 Stat. 469
    ; Act of Mar. 30, 1802,
    ch. 13, 
    2 Stat. 139
    ; Act of June 30, 1834, 
    4 Stat. 729
    . With-
    out exception, those Acts “either explicitly or implicitly reg-
    ulated only the non-Indians who venture[d] into Indian
    country to deal with Indians,” and “did not purport to regu-
    late the [T]ribes or their members” in any way. R. Clinton,
    There is No Federal Supremacy Clause for Indian Tribes,
    34 Ariz. St. L. J. 113, 134 (2002) (Clinton 2002).
    This Court recognized many of these same points in its
    early cases. For example, in Worcester, the State of Georgia
    sought to seize Cherokee lands, abolish the Tribe and its
    laws, and apply its own criminal laws to tribal lands. 
    6 Pet., at
    525–528. Holding Georgia’s laws unconstitutional, this
    Court acknowledged that Tribes remain “independent po-
    litical communities, retaining their original natural rights.”
    
    Id., at 559
    . While “necessarily dependent on” the United
    States, 
    id., at 555
    , under “the settled doctrine of the law of
    Cite as: 
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    GORSUCH, J., concurring
    nations,” the Court held, “a weaker power does not surren-
    der its independence—its right to self-government, by asso-
    ciating with a stronger and taking its protection,” 
    id.,
     at
    560–561. The Cherokee, like other Tribes, remained “a dis-
    tinct community occupying its own territory . . . in which
    the laws of [the State] can have no force, and which the cit-
    izens of [that State] have no right to enter, but with the as-
    sent of the [Tribe] themselves, or in conformity with trea-
    ties, and with the acts of [C]ongress.” 
    Id., at 561
    . Justice
    McLean, concurring, put it succinctly: “All the rights which
    belong to self-government have been recognized as vested
    in [the Tribes].” 
    Id., at 580
    .
    In the end, President Jackson refused to abide by the
    Court’s decision in Worcester, precipitating the Trail of
    Tears. He is quoted as saying: “ ‘John Marshall has made
    his decision; now let him enforce it.’ ” F. Cohen, Handbook
    of Federal Indian Law 123 (1942). But just as this Court
    had no power to enforce its judgment, President Jackson
    had no power to erase its reasoning. So the rule of Worces-
    ter persisted in courts of law, unchanged, for decades. Rec-
    ognizing the inherent sovereignty of Tribes, this Court held
    that States could not tax Indian land. See, e.g., The Kansas
    Indians, 
    5 Wall. 737
    , 751–761 (1867); The New York Indi-
    ans, 
    5 Wall. 761
    , 771–772 (1867). It held that the Four-
    teenth Amendment did not apply on Indian land. See Elk
    v. Wilkins, 
    112 U. S. 94
    , 99–109 (1884). And it sharply lim-
    ited even the power of the federal government to prosecute
    crimes between Indians on Indian land where the Tribe had
    stepped in to resolve the dispute. See Ex parte Crow Dog,
    
    109 U. S. 556
    , 572 (1883).
    Nor did later developments call this original understand-
    ing into doubt. To be sure, in 1871, Congress declared that
    Tribes (prospectively) are no longer parties “with whom the
    United States may contract by treaty.” Act of Mar. 3, 1871,
    
    16 Stat. 566
    , codified at 
    25 U. S. C. §71
    ; but see United
    18                 HAALAND v. BRACKEEN
    GORSUCH, J., concurring
    States v. Lara, 
    541 U. S. 193
    , 218 (2004) (THOMAS, J., con-
    curring in judgment) (describing the Act as “constitution-
    ally suspect”); M. Pearl, Originalism and the Indians, 93
    Tulane L. Rev. 269, 330–331 (2018) (Pearl) (similar). But
    the sponsors of that Act sought only to increase the role of
    bicameral legislation in managing Indian affairs. See An-
    toine v. Washington, 
    420 U. S. 194
    , 202–203 (1975). The
    law did not purport to “invalidat[e] or impai[r]” any existing
    “obligation of any treaty lawfully made and ratified.” 
    25 U. S. C. §71
    . And the law did not abridge, nor could it have
    validly abridged, the long-settled view of tribal sovereignty.
    In fact, the United States proceeded to enter into roughly
    400 further executive agreements with the Tribes practi-
    cally indistinguishable from the treaties that came before.
    See generally V. Deloria & R. DeMallie, Documents of
    American Indian Diplomacy: Treaties, Agreements, and
    Conventions, 1775–1979 (1999). Keep this original under-
    standing of tribal sovereignty in mind. It provides an es-
    sential point of framing.
    B
    Just as the Constitution safeguards the sovereign author-
    ity of Tribes, it comes with a “concomitant jurisdictional
    limit on the reach of state law” over Indian affairs.
    McClanahan v. Arizona Tax Comm’n, 
    411 U. S. 164
    , 171
    (1973). As this Court has consistently recognized, “[t]he
    policy of leaving Indians free from state jurisdiction and
    control is deeply rooted in the Nation’s history.” Rice v. Ol-
    son, 
    324 U. S. 786
    , 789 (1945). Instead, responsibility for
    managing interactions with the Tribes rests exclusively
    with the federal government. To appreciate this point, walk
    through time once more.
    Since the first days of British rule, the Crown oversaw—
    and retained the power to dictate—the Colonies’ engage-
    ment with the Indian Tribes. See Clinton 1995, at 1064–
    Cite as: 
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    GORSUCH, J., concurring
    1098. In response to a pattern of conflict arising out of co-
    lonial intrusion on tribal land, that supervision grew in-
    creasingly exacting. Ibid.; see also R. Clinton, The Procla-
    mation of 1763: Colonial Prelude to Two Centuries of
    Federal-State Conflict Over the Management of Indian Af-
    fairs, 69 B. U. L. Rev. 329, 331–337 (1989) (Clinton 1989).
    In 1743, for example, a British royal commission rejected
    an effort by the colony of Connecticut to exercise independ-
    ent jurisdiction over a Tribe within its borders. 
    Id.,
     at 335–
    336. The decision rested on a now-familiar logic: “The In-
    dians, though living amongst the king’s subjects in these
    countries, are a separate and distinct people from them,
    they are treated with as such, they have a polity of their
    own, they make peace and war with any nation of Indians
    when they think fit, without controul from the English.”
    Opinion of Comm’r Horsmanden, Aug. 1, 1743, in Governor
    and Company of Connecticut, and Mohegan Indians, By
    Their Guardians 126 (1743).
    The mere suggestion of colonial management of tribal re-
    lations catalyzed further “centralization of oversight and
    control of colonial Indian regulation by the British govern-
    ment,” culminating in the Proclamation of 1763. Clinton
    1989, at 336. That proclamation announced the Crown’s
    intent to manage all “land cessions, diplomatic and other
    relations, and trade with the Indian [T]ribes,” and to dis-
    place contrary colonial practice. 
    Id., at 357
    . Britain never
    had a chance to iron out the kinks of that approach before
    the Revolutionary War broke out. But “[i]mmediately prior
    to 1776, the stage was set” for “complete imperial control
    over the management of Indian matters.” 
    Id., at 362
    .
    After the Revolution, the Articles of Confederation gave
    the newly formed “[U]nited [S]tates . . . the sole and exclu-
    sive right and power of . . . managing all affairs with the
    Indians, not members of any of the [S]tates.” Art. IX (1777).
    In providing that grant of authority, the Articles’ drafters
    20                 HAALAND v. BRACKEEN
    GORSUCH, J., concurring
    may have meant to codify the centralized approach the Brit-
    ish had pursued. But the “byzantine” document the draft-
    ers created, Ablavsky 2015, at 1034, came with a pair of
    easily exploited loopholes. First, the language of its Indian
    affairs clause allowed some to claim that various Tribes
    were “ ‘members’ ” of the States and thus “exclusively or
    principally subject to state legislative control.” Clinton
    1995, at 1103, 1150. Second, owing to a fear that the phrase
    “sole and exclusive” could give the misimpression that
    States lacked power to manage their own affairs, the Arti-
    cles’ drafters added another clause stipulating that “the leg-
    islative right of any [S]tate within its own limits be not in-
    fringed or violated.” Art IX. Taken literally, that provision
    meant only that the Articles left to States what belonged to
    the States and to the Tribes what belonged to the Tribes.
    But some States saw in that language too an opportunity to
    assert their own control. See Clinton 1995, at 1103, 1107,
    1113–1118, 1128–1131.
    The result? A season of conflict brought about by state
    and private encroachments on tribal authority. G. Ablav-
    sky, The Savage Constitution, 63 Duke L. J. 999, 1035–
    1036 (2014) (Ablavsky 2014). By the time the Constitu-
    tional Convention rolled around, “Indian uprisings had oc-
    curred . . . in the Ohio River Valley and Virginia,” “the
    Creeks and Georgia were on the brink of open warfare,” and
    there was significant turmoil “on the western frontier.”
    Clinton 1995, at 1147. Those events were not lost on the
    framers. As they debated how to broker enduring peace,
    two predominant schools of thought emerged. Madison and
    his followers favored preventing intrusions on Indian land
    and interests; Hamilton and his adherents favored resort to
    military might. Ablavsky 2014, at 1035–1038. Both sides,
    however, found agreement on the “need for a stronger fed-
    eral government” presence, without the impediment of
    state interference. 
    Id., at 1038
    .
    Cite as: 
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    GORSUCH, J., concurring
    Even as the Constitutional Convention assembled, a com-
    mittee of the Continental Congress noted that it “had been
    long understood and pretty well ascertained” that the
    Crown’s absolute powers to “manag[e] Affairs with the In-
    dians” passed in its “entire[ty] to the Union” following In-
    dependence, meaning that “[t]he laws of the State can have
    no effect upon a [T]ribe of Indians or their lands within the
    limits of the [S]tate so long as that [T]ribe is independent.”
    33 Journals of the Continental Congress 1774–1789, p. 458
    (R. Hill ed. 1936). That had to be so, the committee ob-
    served, for the same reason that individual States could not
    enter treaties with foreign powers: “[T]he Indian [T]ribes
    are justly considered the common friends or enemies of the
    United States, and no particular [S]tate can have an exclu-
    sive interest in the management of Affairs with any of the
    [T]ribes.” 
    Id., at 459
    .
    This understanding found its way directly into the text of
    the Constitution. The final version assigned the newly
    formed federal government a bundle of powers that encom-
    passed “all that is required for the regulation of [the Na-
    tion’s] intercourse with the Indians.” Worcester, 
    6 Pet., at 559
    . By contrast, the Constitution came with no indication
    that States had any similar sort of power. Indeed, it omit-
    ted the nettlesome language in the Articles about the “leg-
    islative right” of States. Not only that. The Constitution’s
    express exclusion of “Indians not taxed” from the apportion-
    ment formula, Art. I, §2, cl. 3, threw cold water on some
    States’ attempts to claim that Tribes fell within their terri-
    tory—and therefore their control. And, lest any doubt re-
    main, the Constitution divested States of any power to “en-
    ter into any Treaty, Alliance, or Confederation.” §10, cl. 1.
    By removing that diplomatic power, the Constitution’s de-
    sign also divested them of the leading tool for managing
    tribal relations at that time.
    The Constitution’s departure from the Articles’ articula-
    22                 HAALAND v. BRACKEEN
    GORSUCH, J., concurring
    tion was praised by many and criticized by some. Federal-
    ists (such as James Madison) applauded the fact that the
    new federal government would be “unfettered” by the Arti-
    cles’ constraints. The Federalist No. 42, p. 268 (C. Rossiter
    ed. 1961). Certain Anti-Federalists (including Abraham
    Yates Jr.) disfavored the “tota[l] surrender into the hands
    of Congress [of] the management and regulation of the In-
    dian affairs.” Letter to Citizens of New York (June 13–14,
    1788), in 20 Documentary History of the Ratification of the
    Constitution 1153, 1158 (J. Kaminski et al. eds. 2004) (em-
    phasis added). At bottom, however, no one questioned that
    the Constitution took a view about where the power to man-
    age Indian affairs would reside in the future. And no one
    doubted that it selected the federal government, not the
    States.
    Early practice confirmed this understanding. “The
    Washington Administration insisted that the federal gov-
    ernment enjoyed exclusive constitutional authority” over
    managing relationships with the Indian Tribes. Ablavsky
    2015, at 1019. As President Washington put it, the federal
    government “possess[ed] the only authority of regulating an
    intercourse with [the Tribes], and redressing their griev-
    ances.” Letter to T. Mifflin (Sept. 4, 1790), in 6 The Papers
    of George Washington: Presidential Series 396 (D. Twohig
    ed. 1996) (emphasis added). Even “many state officials
    agreed” with President Washington’s assessment. Ablav-
    sky 2015, at 1019. South Carolina Governor Charles Pinck-
    ney acknowledged that “the sole management of India[n]
    affairs” is “committed” to “the general Government.” Letter
    to G. Washington (Dec. 14, 1789), in 4 Papers of George
    Washington: Presidential Series 404 (D. Twohig ed. 1996).
    Other leading proponents of States’ rights reluctantly drew
    the same conclusion. “[U]nder the present Constitution,”
    Thomas Jefferson lamented, States lack any “right to Treat
    with the Indians without the consent of the General Gov-
    ernment.” Letter to H. Knox (Aug. 10, 1791), in 22 Papers
    Cite as: 
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    GORSUCH, J., concurring
    of Thomas Jefferson 27 (C. Cullen ed. 1986).
    For its part, this Court understood the absence of state
    authority over tribal matters as a natural corollary of
    Tribes’ inherent sovereignty. Precisely because Tribes exist
    as a “distinct community,” this Court concluded in Worces-
    ter, the “laws of [States] can have no force” as to them. 
    6 Pet., at 561
    . States could no more prescribe rules for Tribes
    than they could legislate for one another or a foreign sover-
    eign. More than that, this Court recognized that “[t]he
    whole intercourse between the United States and [each
    Tribe], is by our [C]onstitution and laws, vested in the gov-
    ernment of the United States.” 
    Ibid.
     (emphasis added).
    State laws cannot “interfere forcibly with the relations es-
    tablished between the United States and [an Indian Tribe],
    the regulation of which, according to the settled principles
    of our [C]onstitution, are committed exclusively to the gov-
    ernment of the [U]nion.” 
    Ibid.
     (emphasis added). That
    principle, too, has endured. No one can contest the “ ‘his-
    toric immunity from state and local control’ ” that the Tribes
    enjoy, nor the permissibility of constitutional provisions en-
    acted to protect the Tribes’ “sovereign status.” New Mexico
    v. Mescalero Apache Tribe, 
    462 U. S. 324
    , 332 (1983). Tuck
    that point away too.
    C
    We now know that, at the founding, the Tribes retained
    their sovereignty. We know also that States have virtually
    no role to play in managing interactions with Tribes. From
    this, it follows that “[t]he only restriction on the power” of
    Tribes “in respect to [their] internal affairs” arises when
    their actions “conflict with the Constitution or laws of the
    United States.” Roff v. Burney, 
    168 U. S. 218
    , 222 (1897).
    In cases like that, the Constitution provides, federal law
    must prevail. See Art. VI. This creates a hydraulic rela-
    tionship between federal and tribal authority. The more
    the former expands, the more the latter shrinks. All of
    24                 HAALAND v. BRACKEEN
    GORSUCH, J., concurring
    which raises the question: What powers does the federal
    government possess with respect to Tribes?
    1
    Because the federal government enjoys only “limited” and
    “enumerated powers,” we look to the Constitution’s text.
    McCulloch v. Maryland, 
    4 Wheat. 316
    , 405 (1819). Notably,
    our founding document does not include a plenary federal
    authority over Tribes. Nor was this an accident, at least
    not in the final accounting. The framers considered a gen-
    eral Indian Affairs Clause but left it on the cutting-room
    floor. See L. Toler, The Missing Indian Affairs Clause, 
    88 U. Chi. L. Rev. 413
    , 444–476 (2021) (Toler). That choice
    reflects an important insight about the Constitution’s
    Indian-law bargain: “Without an Indian affairs power,” any
    assertion of unbounded federal authority over the Tribes is
    “constitutionally wanting.” 
    Id., at 476
    .
    Instead of a free-floating Indian-affairs power, the fram-
    ers opted for a bundle of federal authorities tailored to “the
    regulation of [the Nation’s] intercourse with the Indians.”
    Worcester, 
    6 Pet., at 559
    . In keeping with the framers’ faith
    in the separation of powers, they chose to split those au-
    thorities “between the [E]xecutive and the [L]egislature.”
    Toler 479. “The residue of Indian affairs power”—all those
    Indian-related powers not expressly doled out by the Con-
    stitution—remained the province of “the sovereign
    [T]ribes.” Id., at 481.
    What was included in the federal government’s bundle of
    enumerated powers? In the early years, the most important
    component was the authority to “make Treaties” with the
    Tribes. Art. II, §2, cl. 2. But other provisions also facili-
    tated the management of Indian relations. The Constitu-
    tion vested in Congress the power to “declare War” against
    the Tribes. Art. I., §8, cl. 11. It gave Congress authority to
    “dispose of and make all needful Rules and Regulations re-
    specting the Territory or other Property belonging to the
    Cite as: 
    599 U. S. ____
     (2023)            25
    GORSUCH, J., concurring
    United States,” allowing it considerable power over Indians
    on federal territory. Art. IV, §3, cl. 2. The Constitution also
    authorized Congress to employ its spending power to divert
    funds toward Tribes. Art. I, §8, cl. 1. Where all those pow-
    ers came up short, the Constitution afforded the federal
    government the power to “regulate Commerce with foreign
    Nations and among the several States, and with the Indian
    Tribes.” §8, cl. 3 (emphasis added). Much of modern federal
    Indian law rests on that commerce power. It demands a
    closer look.
    2
    Contained in a single sentence, what we sometimes call
    “the” Commerce Clause is really three distinct Clauses
    rolled into one: a Foreign Commerce Clause, an Interstate
    Commerce Clause, and an Indian Commerce Clause. To be
    sure, those Clauses share the same lead word: “Commerce.”
    And, viewed in isolation, that word might appear to sweep
    narrowly—encompassing activities like “selling, buying,
    and bartering, as well as transporting for these purposes.”
    United States v. Lopez, 
    514 U. S. 549
    , 585–586 (1995)
    (THOMAS, J., concurring) (citing founding-era definitions).
    But it is “well established” that the individual Commerce
    Clauses have “very different applications,” Cotton Petro-
    leum Corp. v. New Mexico, 
    490 U. S. 163
    , 192 (1989), a point
    the framers themselves acknowledged, see, e.g., Letter from
    E. Randolph to G. Washington (Feb. 12, 1791), in 7 Papers
    of George Washington: Presidential Series 330, 331–337 (D.
    Twohig 1998).
    Start with the word “Commerce.” From the Nation’s ear-
    liest days, Indian commerce was considered “a special sub-
    ject with a definite content,” quite “distinct and specialized”
    from other sorts of “commerce.” A. Abel, The Commerce
    Clause in the Constitutional Convention and in Contempo-
    rary Comment, 
    25 Minn. L. Rev. 432
    , 467–468 (1941). A
    26                 HAALAND v. BRACKEEN
    GORSUCH, J., concurring
    survey of founding-era usage confirms that the term “Com-
    merce,” when describing relations with Indians, took on a
    broader meaning than simple economic exchange. See
    Ablavsky 2015, at 1012–1032 (compiling primary sources);
    Brief for Gregory Ablavsky as Amicus Curiae 8–11; App. to
    
    id.,
     at 1–18 (same); see also A. Amar, America’s Constitu-
    tion: A Biography 107 (2005). Instead, the word was used
    as a “term of art,” Pearl 322, to encompass all manner of
    “bilateral relations with the [T]ribes,” Clinton 1995, at
    1145; see also Toler 422 (noting that “Indian commerce”
    was a “legal ter[m] of art” that was “informed by the prac-
    ticalities of Indian affairs”).
    This special usage likely emerged out of an international-
    law idea widely shared “at the time of the founding”: When
    dealing with a foreign sovereign, the “commercial and non-
    commercial aspects” of bilateral interactions were “inevita-
    bly intertwined” because any intercourse carried potential
    diplomatic consequences and could even lead to war. J. Bal-
    kin, Commerce, 
    109 Mich. L. Rev. 1
    , 25 (2010) (Balkin); see
    also Ablavsky 2015, at 1028–1032 (demonstrating that
    “trade with the Indians was understood almost solely
    through this political and diplomatic lens”); Clinton 1989,
    at 362–363 (observing that, at the founding, Indian “trade”
    was “intertwined” with concerns of “peace and diplomacy”
    and with the threat of “war”). Nor was that a speculative
    possibility when it came to Tribes. As we have seen, even
    the noncommercial conduct of settlers in the early years
    was a “continual source of violent conflict [with] Indians,”
    partially motivating the move away from the Articles of
    Confederation framework. M. Fletcher & L. Jurss, Tribal
    Jurisdiction—A Historical Bargain, 
    76 Md. L. Rev. 593
    , 597
    (2017); see also Ablavsky 2014, at 1033–1038.
    At least two terms in the Commerce Clause confirm this
    special usage. For one thing, the Constitution speaks of
    “Commerce . . . among” when discussing interstate deal-
    ings, but “Commerce with” when addressing dealings with
    Cite as: 
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    GORSUCH, J., concurring
    tribal and foreign sovereigns. Art. I, §8, cl. 3 (emphases
    added). This language suggests a shared framework for
    Congress’s Indian and foreign commerce powers and a dif-
    ferent one for its interstate commerce authority. See R.
    Monette, A New Federalism for Indian Tribes: The Rela-
    tionship Between the United States and Tribes in Light of
    Our Federalism and Republican Democracy, 25 U. Toledo
    L. Rev. 617, 629, n. 82 (1994). More than that, the term
    “with” suggests that Congress has the authority to manage
    “all interactions or affairs . . . with the Indian [T]ribes” and
    foreign sovereigns—wherever those interactions or affairs
    may occur. Balkin 23. By contrast, the term “among” found
    in the Interstate Commerce Clause most naturally suggests
    that Congress may regulate only activities that “extend in
    their operation beyond the bounds of a particular [S]tate”
    and into another. Id., at 30. All this goes a long way toward
    explaining why “Congress’s powers to regulate domestic
    commerce are more constrained” than its powers to regu-
    late Indian and foreign commerce. Id., at 29.
    For another thing, as nouns, “States” and “Indian Tribes”
    are not alike—and they were not alike at the founding.
    “States” generally referred then, as it does today, to a col-
    lection of territorial entities. Not so “Tribes.” That term
    necessarily referred to collections of individuals. See C.
    Green, Tribes, Nations, States: Our Three Commerce Pow-
    ers, 127 Pa. St. L. Rev. 643, 649, 654–669 (2023) (Green);
    see also 1 W. Crosskey, Politics and the Constitution in the
    History of the United States 77 (1953). Want proof? Dust
    off most any founding-era dictionary and look up the defi-
    nition of “Tribe.” See, e.g., 2 J. Ash, The New and Complete
    Dictionary of the English Language (1775) (“[a] family, a
    body of the people distinguished by family or fortune”); 2 S.
    Johnson, A Dictionary of the English Language (4th ed.
    1773) (“[a] di[s]tinct body of the people as divided by family
    or fortune, or any other characteri[s]tick”); T. Dyche, A New
    General English Dictionary (14th ed. 1771) (“the particular
    28                 HAALAND v. BRACKEEN
    GORSUCH, J., concurring
    descendants or people [s]prung from [s]ome noted head, or
    a collective number of people in a colony”); N. Bailey, An
    Universal Etymological English Dictionary (22d ed. 1770)
    (“a [c]ompany of [p]eople dwelling together in the [s]ame
    [w]ard or [l]iberty”).
    This observation sheds light on why ordinary speakers
    use the two terms differently. It explains, for instance, why
    it is grammatical to say you are vacationing “in Colorado,”
    but not to say you are vacationing “in Navajo.” It explains
    why it is sensible to say you are meeting “with some Cher-
    okee,” but not to say you are meeting “with some New Jer-
    sey.” But this point also helps us make sense of why the
    Legislative Branch may regulate commerce with Indian
    Tribes differently than it may regulate commerce among
    the States. Because Tribes are collections of people, the In-
    dian Commerce Clause endows Congress with the “author-
    ity to regulate commerce with Native Americans” as indi-
    viduals. McGirt v. Oklahoma, 
    591 U. S. ___
    , ___ (2020) (slip
    op., at 7). By contrast, Congress’s power under the Inter-
    state Commerce Clause operates only on commerce that in-
    volves “more States than one.” Gibbons v. Ogden, 
    9 Wheat. 1
    , 194 (1824). In other words, commerce that takes place
    “among” (or between) two or more territorial units, and not
    just any commerce that involves some member of some
    State. See Green 649–654.
    This Court has long appreciated these points of distinc-
    tion. For example, in United States v. Holliday, 
    3 Wall. 407
    (1866), the Court upheld a federal statute that prohibited
    the sale of alcohol by non-Indians to Indians—on or off
    tribal land. 
    Id.,
     at 416–417. Giving the Indian Commerce
    Clause its most natural reading, the Court concluded that
    the power to regulate commerce with Indian Tribes must
    mean the power to regulate “commerce with the individuals
    composing those [T]ribes.” 
    Id., at 417
     (emphasis added).
    For that reason, too, “[t]he locality of the [commerce could]
    have nothing to do with the [scope of the] power.” 
    Id.,
     at
    Cite as: 
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     (2023)           29
    GORSUCH, J., concurring
    418; see also Henderson v. Mayor of New York, 
    92 U. S. 259
    ,
    270 (1876) (quoting Holliday and echoing this point in the
    context of the Foreign Commerce Clause). More than that,
    Holliday recognized that this focus on individuals means
    that Indian commerce must cover “something more” than
    just economic exchange. 
    3 Wall., at 417
     (internal quotation
    marks omitted). While it includes “buying and selling and
    exchanging commodities,” it also extends to the entire “in-
    tercourse between the citizens of the United States and
    those [T]ribes.” 
    Ibid.
     That “intercourse,” the Court recog-
    nized, is “another branch of commerce” with Indians, “and
    a very important one” at that. 
    Ibid.
    If the Constitution’s text left any uncertainty about the
    scope of Congress’s Indian commerce power, early practice
    liquidated it. The First Congress adopted the initial Indian
    Trade and Intercourse Act, which prohibited the “sale of
    lands made by any Indians” to non-Indians absent a public
    treaty. Act of July 22, 1790, ch. 33, §4, 
    1 Stat. 138
    . The law
    also extended criminal liability to non-Indians who “com-
    mit[ted] any crime upon, or trespass against, the person or
    property of any peaceable and friendly Indian” in Indian
    country. §5, ibid. The first of these provisions arguably
    addressed a narrow question of commerce. But the second
    “plainly regulated noneconomic” interaction. A. Amar,
    America’s Constitution and the Yale School of Constitu-
    tional Interpretation, 115 Yale L. J. 1997, 2004, n. 25
    (2006).
    Despite that fact, the Act (and its successors) were “not
    controversial exercises of congressional power.” N. Newton,
    Federal Power Over Indians: Its Sources, Scope, and Lim-
    itations, 
    132 U. Pa. L. Rev. 195
    , 201, n. 25 (1984). Any
    doubt about their validity “would have been quieted by the
    [C]ommerce Clause’s commitment of commerce with the In-
    dian [T]ribes to Congress.” 
    Ibid.
     As Justice McLean (riding
    circuit) recognized, punishing non-Indians for “committing
    violence upon the persons or property of the Indians,” fell
    30                 HAALAND v. BRACKEEN
    GORSUCH, J., concurring
    “clearly within the scope of the power to regulate commerce
    with the Indian [T]ribes.” United States v. Bailey, 
    424 F. Cas. 937
    , 939 (No. 14,495) (CC Tenn. 1834). Of course,
    the kinds of criminal trespasses Congress regulated as
    early as 1790 were not themselves commercial. But a tres-
    pass against even one individual Indian could disrupt com-
    merce with that individual. See Green 660–661, and n. 76.
    By extension, such a trespass could disrupt dealings with
    other members of the Tribe and with other allied Tribes too.
    See Balkin 24–26. Recognizing this, the framers entrusted
    Congress with the power previously exercised by the Brit-
    ish Parliament to “restrain the disorderly and licentious
    from intrusions” by non-Indians against even individual In-
    dians—all to preserve functioning channels of trade and in-
    tercourse “with the Indians.” Worcester, 
    6 Pet., at 552, 556
    .
    3
    If Congress’s powers under the Indian Commerce Clause
    are broader than those it enjoys under the Interstate Com-
    merce Clause, “broader” does not mean “plenary.” Even the
    federal government’s “power to control and manage” rela-
    tions with the Tribes under the Indian Commerce Clause
    comes with “pertinent constitutional restrictions.” United
    States v. Creek Nation, 
    295 U. S. 103
    , 110 (1935). Congress
    cannot, for example, expand the scope of its own power by
    arbitrarily labeling non-Indians as Indians. See United
    States v. Sandoval, 
    231 U. S. 28
    , 46 (1913). Nor can it reg-
    ulate in peripherally related fields merely by identifying
    some incidental connection to non-Indians’ dealings with
    Indians. Instead, Congress’s actions must still bear a valid
    “nexus” to Indian commerce to withstand constitutional
    challenge. Lopez, 
    514 U. S., at 562
     (quoting United States
    v. Bass, 
    404 U. S. 336
    , 347 (1971)). As we have seen, too,
    “the scope of congressional authority” over the Tribes under
    the Indian Commerce Clause is “best construed as a nega-
    tive one.” Pearl 325. Its text “limits the legislative reach to
    Cite as: 
    599 U. S. ____
     (2023)           31
    GORSUCH, J., concurring
    creating federal restrictions concerning what United States
    citizens and States may do in the context of Indian
    [T]ribes.” 
    Ibid.
     Nothing in the Clause grants Congress the
    affirmative power to reassign to the federal government in-
    herent sovereign authorities that belong to the Tribes.
    In that way, the Indian Commerce Clause confirms, ra-
    ther than abridges, principles of tribal sovereignty. As it
    must. It is “inconceivable” that a power to regulate non-
    Indians’ dealings with Indians could be used to “dives[t
    Tribes] of the right of self-government.” Worcester, 
    6 Pet., at 554
    . Otherwise, a power to manage relations with a
    party would become an instrument for “annihilating the po-
    litical existence of one of the parties.” 
    Ibid.
     No one in the
    Nation’s formative years thought that could be the law.
    They understood that Congress could no more use its com-
    merce powers to legislate away a Tribe than it could a State
    or a foreign sovereign. Cf. National League of Cities v. Us-
    ery, 
    426 U. S. 833
    , 855 (1976); Metcalf & Eddy v. Mitchell,
    
    269 U. S. 514
    , 523–526 (1926); Lane County v. Oregon, 
    7 Wall. 71
    , 76–77 (1869). The framers appreciated, too, that
    they possessed no more “authority to delegate to the na-
    tional government power to regulate the [T]ribes directly”
    than they possessed authority to “delegate power to the fed-
    eral government over other peoples who were not part of
    the federal union.” Clinton 2002, at 254; see also R. Barsh,
    Book Review, Felix S. Cohen’s Handbook of Federal Indian
    Law, 1982 Ed., 
    57 Wash. L. Rev. 799
    , 803 (1982).
    D
    As we have now seen, the Constitution reflected a care-
    fully considered balance between tribal, state, and federal
    powers. That scheme predated the founding and it per-
    sisted long after. It is not, however, the balance this Court
    always maintained in the years since. More than a little
    fault for that fact lies with a doctrinal misstep. In the late
    19th century, this Court misplaced the original meaning of
    32                 HAALAND v. BRACKEEN
    GORSUCH, J., concurring
    the Indian Commerce Clause. That error sent this Court’s
    Indian-law jurisprudence into a tailspin from which it has
    only recently begun to recover. Understanding that error—
    and the steps this Court has taken to correct it—are the last
    missing pieces of the puzzle.
    In 1885, during the period of assimilationist federal pol-
    icy, Congress enacted the Indian Major Crimes Act, §9, 
    23 Stat. 385
    . Among other things, that law extended federal-
    court jurisdiction over various crimes committed by Indians
    against Indians on tribal lands. 
    Ibid.
     In United States v.
    Kagama, 
    118 U. S. 375
     (1886), this Court upheld the con-
    stitutionality of that Act. In the process, though, it stepped
    off the doctrinal trail. Instead of examining the text and
    history of the Indian Commerce Clause, the Court offered a
    free-floating and purposivist account of the Constitution,
    describing it as extending broad “power [to] the General
    Government” over tribal affairs. 
    Id., at 384
    . Building on
    that move, the Court would later come to describe the fed-
    eral power over the Tribes as “plenary.” See, e.g., Winton v.
    Amos, 
    255 U. S. 373
    , 391 (1921); Lone Wolf v. Hitchcock, 
    187 U. S. 553
    , 565 (1903).
    Perhaps the Court meant well. Surely many of its so-
    called “plenary power” cases reached results explainable
    under a proper reading of the Constitution’s enumerated
    powers. Maybe the turn of phrase even made some sense:
    Congress’s power with regard to the Tribes is “plenary” in
    that it leaves no room for State involvement. See Ablavsky
    2015, at 1014 (“[T]he Court use[d] the term [plenary] inter-
    changeably with ‘exclusive’ ”). But as sometimes happens
    when this Court elides text and original meaning in favor
    of broad pronouncements about the Constitution’s pur-
    poses, the plenary-power idea baked in the prejudices of the
    day. Cf. Plessy v. Ferguson, 
    163 U. S. 537
     (1896). The Court
    suggested that the federal government’s total power over
    the Tribes derived from its supposedly inherent right to “en-
    force its laws” over “th[e] remnants of a race once powerful,
    Cite as: 
    599 U. S. ____
     (2023)             33
    GORSUCH, J., concurring
    now weak.” Kagama, 
    118 U. S., at
    384–385. Of course,
    nothing of the sort follows from “a reasoned analysis de-
    rived from the text [or] history . . . of the United States Con-
    stitution.” Clinton 2002, at 163. Instead, the plenary-
    power idea “constituted an unprincipled assertion of raw
    federal authority.” 
    Ibid.
     It rested on nothing more than
    judicial claims about putative constitutional purposes that
    aligned with contemporary policy preferences.
    Nor was anachronistic language the only consequence of
    this Court’s abandonment of the Constitution’s original
    meaning. During what has been called the “high plenary
    power era of U. S. Indian law,” this Court sometimes took
    the word “plenary” pretty literally. S. Cleveland, Powers
    Inherent in Sovereignty: Indians, Aliens, Territories, and
    the Nineteenth Century Origins of Plenary Power Over
    Foreign Affairs, 81 Texas L. Rev. 1, 62 (2002) (Cleveland).
    It assumed that Congress possesses a “virtually unlimited
    authority to regulate [T]ribes” in every respect. M. Steele,
    Plenary Power, Political Questions, and Sovereignty in In-
    dian Affairs, 
    63 UCLA L. Rev. 666
    , 670 (2016); see Cleve-
    land 62–74. Perhaps most notably, the Court even sug-
    gested that Congress’s “plenary authority” might allow
    it to “limit, modify, or eliminate the powers of local self-
    government which the [T]ribes otherwise possess.” Santa
    Clara Pueblo v. Martinez, 
    436 U. S. 49
    , 56–57 (1978). It is
    an “inconceivable” suggestion for anyone who takes the
    Constitution’s original meaning seriously. Worcester, 
    6 Pet., at 554
    .
    The Court’s atextual and ahistorical plenary-power move
    did not just serve to expand the scope of federal power over
    the Tribes. It also had predictable downstream effects on
    the relationship between States and Tribes. As Congress
    assumed new power to intrude on tribal sovereignty, the
    Constitution’s “concomitant jurisdictional limit on the
    reach of state law” began to wane. McClanahan, 
    411 U. S., at 171
    . It is not hard to draw a through-line between these
    34                 HAALAND v. BRACKEEN
    GORSUCH, J., concurring
    developments. This Court itself has acknowledged that its
    plenary-power cases embodied a “trend . . . away from the
    idea of inherent Indian sovereignty as a bar to state juris-
    diction.” 
    Id., at 172
    , and n. 7.
    It is no coincidence either that this Court’s plenary-power
    jurisprudence emerged in the same era as Indian boarding
    schools and other assimilationist policies. See D. Moore &
    M. Steele, Revitalizing Tribal Sovereignty in Treatymak-
    ing, 97 N. Y. U. L. Rev. 137, 142 (2022). Rather, “[f]ederal
    bureaucratic control over Indian leadership and govern-
    ments ran parallel to the government’s control over Indian
    children” during this period. Fletcher & Singel 930. Indian
    boarding schools and other intrusive “federal educational
    programs . . . could not have been implemented without fed-
    eral control of reservation governance.” 
    Ibid.
     Nor could any
    of these federal intrusions on internal tribal affairs have
    been possible without this Court’s plenary-power misad-
    venture.
    I do not mean to overstate the point. Even in the heyday
    of the plenary-power theory, this Court never doubted that
    Tribes retain a variety of self-government powers. It has
    always acknowledged that Tribes are “a separate people,
    with the power of regulating their internal and social rela-
    tions.” Kagama, 
    118 U. S., at
    381–382. They may “make
    their own substantive law in internal matters.” Martinez,
    
    436 U. S., at 55
    . They may define their own membership.
    Roff, 
    168 U. S., at 222
    . They may set probate rules of their
    choice. Jones v. Meehan, 
    175 U. S. 1
    , 29 (1899). And—es-
    pecially relevant here—they may handle their own family-
    law matters, Fisher v. District Court of Sixteenth Judicial
    Dist. of Mont., 
    424 U. S. 382
    , 387 (1976) (per curiam), and
    domestic disputes, United States v. Quiver, 
    241 U. S. 602
    ,
    605 (1916). But for a period at least, this Court let itself
    drift from the “basic policy of Worcester,” and with it the
    Constitution’s promise of tribal sovereignty. Williams v.
    Lee, 
    358 U. S. 217
    , 219 (1959).
    Cite as: 
    599 U. S. ____
     (2023)            35
    GORSUCH, J., concurring
    Doubtless, too, the rise of the plenary-power theory in-
    jected incoherence into our Indian-law jurisprudence.
    Many scholars have commented on it. See, e.g., P. Frickey,
    Doctrine, Context, Institutional Relationships, and Com-
    mentary: The Malaise of Federal Indian Law Through the
    Lens of Lone Wolf, 
    38 Tulsa L. Rev. 5
    , 9 (2002) (describing
    our doctrine as “riddled with . . . inconsistency”); F. Pom-
    mersheim, A Path Near the Clearing: An Essay on Consti-
    tutional Adjudication in Tribal Courts, 
    27 Gonz. L. Rev. 393
    , 403 (1991) (calling our doctrine “bifurcated, if not fully
    schizophrenic”). So have Members of this Court. JUSTICE
    THOMAS has put the problem well: “[M]uch of the confusion
    reflected in our precedent arises from two largely incompat-
    ible” assumptions: That Congress “can regulate virtually
    every aspect of the [T]ribes”; and that “Indian [T]ribes re-
    tain inherent sovereignty.” Lara, 
    541 U. S., at
    214–215
    (opinion concurring in judgment). Those two propositions
    of course clash. That is because only one is true. Yes,
    Tribes retain the inherent sovereignty the Constitution left
    for them. But no, Congress does not possess power to “cal-
    ibrate ‘the metes and bounds of tribal sovereignty.’ ” 
    Ibid.
    In recent years, this Court has begun to correct its mis-
    take. Increasingly, it has emphasized original meaning in
    constitutional interpretation. See, e.g., Kennedy v. Bremer-
    ton School Dist., 
    597 U. S. ___
    , ___–___ (2022) (slip op., at
    23–24); Ramos v. Louisiana, 
    590 U. S. ___
    , ___, ___–___
    (2020) (slip op., at 6, 11–17). In the process, it has come
    again to recognize the Indian Commerce Clause provides
    the federal government only so much “power to deal with
    the Indian Tribes.” Mancari, 
    417 U. S., at
    551–552. But to
    date, these corrective steps have not yielded all they should.
    While this Court has stopped overreading its own plenary-
    power precedents, it has yet to recover fully the original
    meaning of the Indian Commerce Clause.
    Today, the Court takes further steps in the right direc-
    tion. It recognizes that Congress’s powers with respect to
    36                 HAALAND v. BRACKEEN
    GORSUCH, J., concurring
    the Tribes “derive from the Constitution, not the atmos-
    phere.” Ante, at 11. It engages in a robust history-driven
    analysis of the various fonts of congressional authority
    without relying only on platitudes about plenary power.
    Ante, at 11–13. It notes that, as an original matter, the In-
    dian Commerce Clause is “broad” and covers more than
    garden-variety commercial activity. Ante, at 11–16. In the
    process, it reaffirms that “ ‘commerce with the Indian
    [T]ribes’ ” necessarily covers commerce with “Indians as in-
    dividuals.” Ante, at 15–16.
    No less importantly, the Court acknowledges what the
    federal government cannot do. “Article I gives Congress a
    series of enumerated powers, not a series of blank checks.”
    Ante, at 13. And that means that “Congress’s authority to
    legislate with respect to Indians is not unbounded,” but in-
    stead comes with concrete limitations. 
    Ibid.
     To resolve the
    present dispute, the Court understandably sees no need to
    demarcate those limitations further. But I hope that, in
    time, it will follow the implications of today’s decision where
    they lead and return us to the original bargain struck in the
    Constitution—and, with it, the respect for Indian sover-
    eignty it entails.
    III
    With all the historical pieces of this puzzle assembled,
    only one task remains. You must decide for yourself if
    ICWA passes constitutional muster.
    By now, the full picture has come into view and it is easy
    to see why ICWA must stand. Under our Constitution,
    Tribes remain independent sovereigns responsible for gov-
    erning their own affairs. And as this Court has long recog-
    nized, domestic law arrangements fall within Tribes’ tradi-
    tional powers of self-governance. See, e.g., Fisher, 
    424 U. S., at 387
    ; Quiver, 
    241 U. S., at 605
    . As “ ‘a separate peo-
    ple’ ” Tribes may “ ‘regulat[e] their internal and social rela-
    tions’ ” as they wish. Wheeler, 
    435 U. S., at 322
     (quoting
    Cite as: 
    599 U. S. ____
     (2023)           37
    GORSUCH, J., concurring
    Kagama, 
    118 U. S., at
    381–382). In enacting ICWA, Con-
    gress affirmed this understanding. It recognized that
    “there is no resource that is more vital to the continued ex-
    istence and integrity of Indian [T]ribes than their children.”
    
    25 U. S. C. §1901
    (3). Yet it also recognized that the mass-
    removal of Indian children by States and other outsiders
    threatened the “continued existence and integrity of Indian
    [T]ribes.” Ibid.; see also §1901(4). By setting out to elimi-
    nate that practice, Congress sought to preserve the
    Indian-law bargain written into the Constitution’s text by
    securing the continued viability of the “third sovereign.” S.
    O’Connor, Remark, Lessons From the Third Sovereign: In-
    dian Tribal Courts, 33 Tulsa L. J. 1 (1997).
    No doubt, ICWA sharply limits the ability of States to im-
    pose their own family-law policies on tribal members. But
    as we have seen, state intrusions on tribal authority have
    been a recurring theme throughout American history. See
    Ablavsky 2014, at 1009–1037. Long ago, those intrusions
    led the framers to abandon the loophole-ridden Indian af-
    fairs provision in the Articles of Confederation and adopt in
    the Constitution a different arrangement that commits the
    management of tribal relations solely to the federal govern-
    ment. Id., at 1038–1051; see also Clinton 1995, at 1098–
    1165. Recognizing as much, this Court has consistently re-
    affirmed the Tribes’ “immunity from state and local con-
    trol.” Arizona v. San Carlos Apache Tribe of Ariz., 
    463 U. S. 545
    , 571 (1983) (internal quotation marks omitted). If that
    immunity means anything, it must mean that States and
    others cannot use their own laws to displace federal Indian
    policy.
    Nor is there any serious question that Congress has the
    power under the Indian Commerce Clause to enact protec-
    tions against the removal of Indian children. Thankfully,
    Indian children are not (these days) units of commerce. Cf.
    Fletcher & Singel 897–898 (describing an early practice of
    enslaving Indian children). But at its core, ICWA restricts
    38                 HAALAND v. BRACKEEN
    GORSUCH, J., concurring
    how non-Indians (States and private individuals) may en-
    gage with Indians. And, as we have seen, that falls in the
    heartland of Congress’s constitutional authority. Recall
    that the very first Congresses punished non-Indians who
    “commit[ted] any crime upon [any] friendly Indian.” Act of
    July 22, 1790, ch. 33, §5, 
    1 Stat. 138
    . ICWA operates in
    much the same way. The mass removal of Indian children
    by States and private parties, no less than a pattern of crim-
    inal trespasses by States and private parties, directly inter-
    feres with tribal intercourse. More than that, it threatens
    the Tribes’ “political existence.” Worcester, 
    6 Pet., at 536
    .
    And at the risk of stating the obvious, Indian commerce is
    hard to maintain if there are no Indian communities left to
    do commerce with.
    IV
    Often, Native American Tribes have come to this Court
    seeking justice only to leave with bowed heads and empty
    hands. But that is not because this Court has no justice to
    offer them. Our Constitution reserves for the Tribes a
    place—an enduring place—in the structure of American
    life. It promises them sovereignty for as long as they wish
    to keep it. And it secures that promise by divesting States
    of authority over Indian affairs and by giving the federal
    government certain significant (but limited and enumer-
    ated) powers aimed at building a lasting peace. In adopting
    the Indian Child Welfare Act, Congress exercised that law-
    ful authority to secure the right of Indian parents to raise
    their families as they please; the right of Indian children to
    grow in their culture; and the right of Indian communities
    to resist fading into the twilight of history. All of that is in
    keeping with the Constitution’s original design.
    Cite as: 
    599 U. S. ____
     (2023)           1
    KAVANAUGH, J., concurring
    SUPREME COURT OF THE UNITED STATES
    _________________
    Nos. 21–376, 21–377, 21–378 and 21–380
    _________________
    DEB HAALAND, SECRETARY OF THE INTERIOR,
    ET AL., PETITIONERS
    21–376                 v.
    CHAD EVERET BRACKEEN, ET AL.
    CHEROKEE NATION, ET AL., PETITIONERS
    21–377              v.
    CHAD EVERET BRACKEEN, ET AL.
    TEXAS, PETITIONER
    21–378                 v.
    DEB HAALAND, SECRETARY OF THE
    INTERIOR, ET AL.
    CHAD EVERET BRACKEEN, ET AL., PETITIONERS
    21–380               v.
    DEB HAALAND, SECRETARY OF THE
    INTERIOR, ET AL.
    ON WRITS OF CERTIORARI TO THE UNITED STATES COURT OF
    APPEALS FOR THE FIFTH CIRCUIT
    [June 15, 2023]
    JUSTICE KAVANAUGH, concurring.
    I join the Court’s opinion in full. I write separately to
    emphasize that the Court today does not address or decide
    the equal protection issue that can arise when the Indian
    Child Welfare Act is applied in individual foster care or
    adoption proceedings. See ante, at 29, 32, n. 10. As the
    Court explains, the plaintiffs in this federal-court suit
    2                  HAALAND v. BRACKEEN
    KAVANAUGH, J., concurring
    against federal parties lack standing to raise the equal
    protection issue. So the equal protection issue remains
    undecided.
    In my view, the equal protection issue is serious. Under
    the Act, a child in foster care or adoption proceedings may
    in some cases be denied a particular placement because of
    the child’s race—even if the placement is otherwise
    determined to be in the child’s best interests. And a
    prospective foster or adoptive parent may in some cases be
    denied the opportunity to foster or adopt a child because of
    the prospective parent’s race. Those scenarios raise
    significant questions under bedrock equal protection
    principles and this Court’s precedents. See Palmore v.
    Sidoti, 
    466 U. S. 429
     (1984). Courts, including ultimately
    this Court, will be able to address the equal protection issue
    when it is properly raised by a plaintiff with standing—for
    example, by a prospective foster or adoptive parent or child
    in a case arising out of a state-court foster care or adoption
    proceeding. See ante, at 29, 32, n. 10.
    Cite as: 
    599 U. S. ____
     (2023)           1
    THOMAS, J., dissenting
    SUPREME COURT OF THE UNITED STATES
    _________________
    Nos. 21–376, 21–377, 21–378 and 21–380
    _________________
    DEB HAALAND, SECRETARY OF THE INTERIOR,
    ET AL., PETITIONERS
    21–376                 v.
    CHAD EVERET BRACKEEN, ET AL.
    CHEROKEE NATION, ET AL., PETITIONERS
    21–377              v.
    CHAD EVERET BRACKEEN, ET AL.
    TEXAS, PETITIONER
    21–378                 v.
    DEB HAALAND, SECRETARY OF THE
    INTERIOR, ET AL.
    CHAD EVERET BRACKEEN, ET AL., PETITIONERS
    21–380               v.
    DEB HAALAND, SECRETARY OF THE
    INTERIOR, ET AL.
    ON WRITS OF CERTIORARI TO THE UNITED STATES COURT OF
    APPEALS FOR THE FIFTH CIRCUIT
    [June 15, 2023]
    JUSTICE THOMAS, dissenting.
    These cases concern the Federal Government’s attempt
    to regulate child-welfare proceedings in state courts. That
    should raise alarm bells. Our Federal “[G]overnment is
    acknowledged by all to be one of enumerated powers,” hav-
    ing only those powers that the Constitution confers ex-
    2                  HAALAND v. BRACKEEN
    THOMAS, J., dissenting
    pressly or by necessary implication. McCulloch v. Mary-
    land, 
    4 Wheat. 316
    , 405 (1819). All other powers (like fam-
    ily or criminal law) generally remain with the States. The
    Federal Government thus lacks a general police power to
    regulate state family law.
    However, in the Indian Child Welfare Act (ICWA), Con-
    gress ignored the normal limits on the Federal Govern-
    ment’s power and prescribed rules to regulate state child
    custody proceedings in one circumstance: when the child in-
    volved happens to be an Indian. As the majority acknowl-
    edges, ICWA often overrides state family law by dictating
    that state courts place Indian children with Indian caretak-
    ers even if doing so is not in the child’s best interest. See
    ante, at 2. It imposes heightened standards before remov-
    ing Indian children from unsafe environments. See ante, at
    3–4. And it allows tribes to unilaterally enroll Indian chil-
    dren and then intervene in their custody proceedings. See
    ante, at 4, 6–8.
    In the normal course, we would say that the Federal Gov-
    ernment has no authority to enact any of this. Yet the ma-
    jority declines to hold that ICWA is unconstitutional, rea-
    soning that the petitioners before us have not borne their
    burden of showing how Congress exceeded its powers. This
    gets things backwards. When Congress has so clearly in-
    truded upon a longstanding domain of exclusive state pow-
    ers, we must ask not whether a constitutional provision pro-
    hibits that intrusion, but whether a constitutional provision
    authorizes it.
    The majority and respondents gesture to a smorgasbord
    of constitutional hooks to support ICWA; not one of them
    works. First, the Indian Commerce Clause is about com-
    merce, not children. See Adoptive Couple v. Baby Girl, 
    570 U. S. 637
    , 659–665 (2013) (THOMAS, J., concurring). Sec-
    ond, the Treaty Clause does no work because ICWA is not
    based on any treaty. Third, the foreign-affairs powers
    (what the majority terms “structural principles”) inherent
    Cite as: 
    599 U. S. ____
     (2023)            3
    THOMAS, J., dissenting
    in the Federal Government have no application to regulat-
    ing the domestic child custody proceedings of U. S. citizens
    living within the jurisdiction of States.
    I would go no further. But, as the majority notes, the
    Court’s precedents have repeatedly referred to a “plenary
    power” that Congress possesses over Indian affairs, as well
    as a general “trust” relationship with the Indians. I have
    searched in vain for any constitutional basis for such a ple-
    nary power, which appears to have been born of loose lan-
    guage and judicial ipse dixit. And, even taking the Court’s
    precedents as given, there is no reason to extend this “ple-
    nary power” to the situation before us today: regulating
    state-court child custody proceedings of U. S. citizens, who
    may never have even set foot on Indian lands, merely be-
    cause the child involved happens to be an Indian.
    I
    State courts usually apply state law when resolving child
    custody issues. This would normally be true for most Indi-
    ans, too. Today, Indians are citizens of the United States;
    the vast majority of them do not live on any reservation or
    Indian lands, but live (as most citizens) on lands that are
    wholly within a State’s jurisdiction. See ch. 233, 
    43 Stat. 253
    ; Dept. of Health and Human Services, Office of Minor-
    ity Health, Profile: American Indian/Alaska Native (Feb.
    24,    2023),    https://minorityhealth.hhs.gov/omh/browse
    .aspx?lvl=3&lvlid=62 (87% live off Indian lands). Thus, one
    might expect that when a child custody issue regarding an
    Indian child arises in a state court, that court would apply
    the same laws that it would for any other citizen.
    But ICWA displaces the normal state laws governing
    child custody when it comes to only one group of citizens:
    Indian children. ICWA defines “Indian child” capaciously:
    It includes not only children who are members of an Indian
    tribe, but also those children who are merely eligible for
    membership in a tribe and are the biological child of a tribal
    4                  HAALAND v. BRACKEEN
    THOMAS, J., dissenting
    member. See 
    25 U. S. C. §1903
    (4). If the child resides on
    Indian tribal lands, then the Indian tribal court has juris-
    diction. §1911(a). But, if the child resides within a State,
    ICWA requires state courts to transfer any proceedings to
    a tribal court, absent “good cause to the contrary,” upon pe-
    tition by the child’s parent, custodian, or tribe. §1911(b).
    Even when the state court retains the proceedings, ICWA
    replaces state law with a strict set of federal rules. For ex-
    ample, if the State fears that a child is suffering physical or
    sexual abuse, it must clear a set of hurdles before placing
    the child in foster care or terminating the parent’s rights.
    §§1912(a)–(e). If the parent wishes to voluntarily relin-
    quish his or her rights and facilitate an adoption, the child’s
    tribe has a right to intervene “at any point” and to collater-
    ally attack the court’s decree. §§1911(c), 1914. Moreover,
    it appears that tribes can enroll children unilaterally, with-
    out the parent’s consent. Accordingly, even if the biological
    parents, the child, the adoptive parents, and the court all
    agree on what is best for the child, the tribe can intervene
    at the eleventh hour, without any consent from the parents
    or child, and block the proceedings. In fact, that is exactly
    what happened here—the children were unilaterally desig-
    nated as tribal members by tribes, which then sought to
    block adoptions that everyone else thought were best for the
    children involved. And, even though some of those adop-
    tions have now been finalized, it appears that the tribes can
    collaterally attack them for an indefinite period of time.
    §1914.
    Besides these procedural hurdles, ICWA dictates the
    preferences a court must adhere to when deciding where to
    place the child. In the typical case, the primary considera-
    tion would be the best interests of that child. E.g., 
    Tex. Fam. Code Ann. §153.002
     (West 2014); American Law In-
    stitute, Principles of the Law of Family Dissolution §2.02
    (2002); Friederwitzer v. Friederwitzer, 55 N. Y. 2d 89, 92,
    
    432 N. E. 2d 765
    , 767 (1982); Karner v. McMahon, 433 Pa.
    Cite as: 
    599 U. S. ____
     (2023)                    5
    THOMAS, J., dissenting
    Super. 290, 302, 
    640 A. 2d 926
    , 932 (1994). That makes
    sense; as the majority notes, these children are some of the
    most vulnerable among us, and their interests should be a
    court’s primary concern. See ante, at 1. But ICWA dis-
    places that standard with its own hierarchy of preferences,
    requiring a court to prefer any placements with (1) a mem-
    ber of the child’s extended family; (2) other members of the
    child’s tribe; and (3) other Indian families of any tribe, an-
    ywhere in the country. §1915(a). Similar rules govern fos-
    ter-care placements. §1915(b). As the majority notes, these
    preferences collectively ensure that any Indian from any
    tribe in the country outranks all non-Indians for adopting
    and fostering those whom ICWA deems to be Indian chil-
    dren. See ante, at 5.
    Again, these detailed rules govern the child custody pro-
    ceedings of U. S. citizens in state courts only because the
    child is also either a member of an Indian tribe or merely
    eligible for membership in a tribe. (The child or parents
    need never have set foot on Indian lands or have any desire
    to affiliate themselves with a tribe.1) The child and his or
    her biological parents and relatives can all support an adop-
    tion, yet ICWA may stand in the way.
    Normally, we would say that the Federal Government
    plainly lacks the authority to enact a law like this. The only
    question is thus whether Congress has some additional au-
    thority that allows it to regulate the adoption process for
    U. S. citizens in state courts merely because the child in-
    volved happens to be an Indian. To answer that question, I
    turn first to the text and original meaning of the Constitu-
    tion.
    ——————
    1 An analogous law might be if the Federal Government tried to regu-
    late the child custody proceedings of U. S. citizens who are eligible for
    Russian, Mexican, Israeli, or Irish citizenship.
    6                  HAALAND v. BRACKEEN
    THOMAS, J., dissenting
    II
    To explain the original understanding of the Constitu-
    tion’s enumerated powers with regard to Indians, I start
    with our Nation’s Founding-era dealings with Indian tribes.
    Those early interactions underscore that the Constitution
    conferred specific, enumerated powers on the Federal Gov-
    ernment which aimed at specific problems that the Nation
    faced under the Articles of Confederation. The new Federal
    Government’s actions with respect to Indian tribes are eas-
    ily explained by those enumerated powers. Meanwhile, the
    States continued to enjoy substantial authority with regard
    to tribes. At each turn, history and constitutional text thus
    point to a set of enumerated powers that can be applied to
    Indian tribes—not some sort of amorphous, unlimited
    power than can be applied to displace all state laws when it
    comes to Indians.
    A
    Before the Revolution, most of the Thirteen Colonies
    adopted their own regulations governing Indian trade. See
    Adoptive Couple, 
    570 U. S., at 660
     (THOMAS, J., concurring);
    R. Natelson, The Original Understanding of the Indian
    Commerce Clause, 85 Denver U. L. Rev. 201, 219, and
    n. 121 (2007) (Natelson) (collecting laws). These regula-
    tions were necessary because colonial traders abused their
    Indian trading partners, often provoking violent Indian re-
    taliation. See Adoptive Couple, 
    570 U. S., at
    660–661; 1 F.
    Prucha, The Great Father 18–21 (1984) (Prucha). Most co-
    lonial governments thus imposed licensing systems of some
    form both to protect Indians and to maintain trading rela-
    tionships with them. See id., at 19. However, the colonial
    laws were not uniform, leading to rivalries between the Col-
    onies, corruption, fraud, and other abuses by traders. Id.,
    at 21. Then, once the Nation had achieved independence,
    it “faced innumerable difficulties,” id., at 46, from finding
    ways to uphold its treaties with foreign nations to economic
    Cite as: 
    599 U. S. ____
     (2023)                    7
    THOMAS, J., dissenting
    upheaval at home, J. Marshall, The Life of George Wash-
    ington 313–316 (R. Faulkner & P. Carrese eds. 2000).
    Peace with the Indians, rather than conflicts sparked by
    unscrupulous traders, was imperative. Prucha 46.
    The Articles of Confederation aimed to meet that need in
    part by giving Congress “the sole and exclusive right and
    power of . . . regulating the trade and managing all affairs
    with the Indians.” Art. IX, cl. 4. However, that broad
    power came with two limitations: First, the Indians could
    not be “members of any of the states.” 
    Ibid.
     And, second,
    “the legislative right of any state within its own limits
    [could not] be infringed or violated.” 
    Ibid.
     In part because
    of those limitations, the Articles’ solution proved to be less
    than ideal. As James Madison would later write, the two
    limits were “obscure and contradictory”; the new Nation
    had “not yet settled” on which Indians were “members” of a
    State or which state “legislative right[s]” could not be “in-
    fringe[d].” The Federalist No. 42, pp. 268–269 (C. Rossiter
    ed. 1961).2 More broadly, the Confederation Congress
    lacked any robust authority to enforce congressional laws
    or treaties (in this or any other domain). For example, it
    had no power to make laws supreme over state law; there
    was no executive power independent of the States; and
    state officers were not bound by oath to support the Arti-
    cles.
    Under the Articles, Congress entered treaties with vari-
    ous tribes and sought to maintain a mostly peaceful rela-
    tionship with the Indians—but its authority was under-
    mined at every turn. See Prucha 44–50. Again and again,
    Congress entered treaties with Indians that established
    boundary lines and lands set apart for the Indians, and
    ——————
    2 For example, though it was not exactly settled what it meant for an
    Indian to be a “member” of a State, the definition often turned on
    whether the Indian paid taxes in or was a citizen of that State. Adoptive
    Couple v. Baby Girl, 
    570 U. S. 637
    , 662, n. 2 (2013) (THOMAS, J., concur-
    ring).
    8                  HAALAND v. BRACKEEN
    THOMAS, J., dissenting
    again and again, frontier settlers encroached on Indian ter-
    ritory and committed acts that violated those treaties. 
    Id.,
    at 46–48; F. Cohen, Handbook of Federal Indian Law
    §1.02[3], pp. 21–22 (2012) (Cohen). Such violations were
    taken seriously; as offenses against “the laws of nations,”
    they provoked the Indians and provided “just causes of
    war.” The Federalist No. 3, at 44 (J. Jay); see also 2 E. de
    Vattel, The Law of Nations §§71–76, pp. 161–163 (J. Chitty
    ed. 1876).
    Yet the Confederation Congress was almost powerless to
    stop these abuses. After a committee noted confusion about
    the extent of congressional power over Indian affairs in
    1787, Congress had to ask the States for their cooperation
    in curbing the abuses that their own citizens were perpe-
    trating. Prucha 48–49. The weakness of Congress meant,
    however, that “federal attempts to check state intrusions
    were often ignored.” Cohen §1.02[3], at 22. The result was
    that, by the time of the Constitutional Convention, “the
    young nation [stood on] the brink of Indian warfare on sev-
    eral fronts.” Ibid. Such a war, feared some Founders, could
    be destructive to the fledgling Republic. See G. Ablavsky,
    The Savage Constitution, 63 Duke L. J. 999, 1033 (2014).
    The Constitution addressed those problems in several
    ways. First and most plainly, the Constitution made all
    federal treaties and laws “the supreme Law of the Land,”
    notwithstanding the laws of any State. Art. VI. It empow-
    ered Congress not only to “declare War,” but also to “raise
    and support Armies,” “provide and maintain a Navy,” and
    “provide for calling forth the Militia to execute the Laws of
    the Union.” Art. I, §8. It enabled Congress to “define and
    punish . . . Offences against the Law of Nations.” Ibid. And
    it granted Congress the authority to “make all Laws which
    shall be necessary and proper” for carrying out any of those
    powers. Ibid.
    The Constitution also provided one power specific to In-
    dian tribes: the power “[t]o regulate Commerce . . . with the
    Cite as: 
    599 U. S. ____
     (2023)             9
    THOMAS, J., dissenting
    Indian Tribes.” §8, cl. 3. That power, however, came very
    late in the drafting process and was narrower than initially
    proposed. See L. Toler, The Missing Indian Affairs Clause,
    
    88 U. Chi. L. Rev. 413
    , 444–464 (2021) (Toler). At two sep-
    arate points, James Madison and John Rutledge proposed
    a power to “ ‘regulate affairs with the Indians,’ ” a provision
    that would have mirrored the Articles. 
    Id.,
     at 447–448,
    464–465 (emphasis added). Neither proposal received
    much debate, and both were rejected. See 
    id.,
     at 464–466.
    Instead, the Convention opted to include Indian tribes in a
    provision that had initially been drafted to include only
    power to “ ‘regulate commerce with foreign nations, and
    among the several States.’ ” See 
    ibid.
     The Convention thus
    expanded the Commerce Clause to the form we know today,
    empowering Congress to “ ‘regulate Commerce with foreign
    Nations, and among the several States, and with the Indian
    tribes.’ ” 
    Id., at 466
    .
    On top of those powers, one more warrants note. As I
    have written previously, the Constitution vests the Presi-
    dent with certain foreign-affairs powers including “[t]he ex-
    ecutive Power,” which includes a residual authority over
    war, peace, and foreign interactions. See Art. II; Zivotofsky
    v. Kerry, 
    576 U. S. 1
    , 35–40 (2015) (THOMAS, J., concurring
    in judgment in part and dissenting in part); United States
    v. Curtiss-Wright Export Corp., 
    299 U. S. 304
    , 319 (1936).
    From the start, Presidents have exercised foreign-affairs
    powers not specifically enumerated on matters ranging
    from maintaining the peace and issuing passports to com-
    municating with foreign governments and repelling sudden
    attacks on the Nation. S. Prakash, Imperial From the Be-
    ginning 119–132 (2015). In his Neutrality Proclamation,
    for example, President Washington declared that the
    United States would remain strictly neutral in the then-on-
    going war between England and France. See A Proclama-
    tion (Apr. 22, 1793), reprinted in 1 American State Papers
    10                HAALAND v. BRACKEEN
    THOMAS, J., dissenting
    140 (W. Lowrie & M. Clarke eds. 1833). Congress sup-
    ported his Proclamation by imposing criminal penalties on
    anyone who, among other things, went “beyond the limits
    or jurisdiction of the United States with intent to be en-
    listed or entered in the service of any foreign prince or
    state.” §2, 
    1 Stat. 383
    . While this Court has at times de-
    bated whether those residual foreign-affairs powers are lo-
    cated in the Executive exclusively or the Federal Govern-
    ment more broadly, see Zivotofsky, 576 U. S., at 20–22, it
    has long recognized the powers as arising from our consti-
    tutional framework and residing at the federal level, see,
    e.g., Curtiss-Wright, 
    299 U. S., at 318
    .
    B
    After the Constitution’s ratification, the new Federal
    Government exercised its enumerated powers with regard
    to Indian tribes. To start, the Government embarked on an
    era of treaty-making with Indian tribes. See Cohen
    §1.03[1], at 23. That treaty-focused policy reflected the
    Washington administration’s view that Indian tribes were
    best dealt with as mostly “foreign nations,” with an eye to-
    wards peace lest frontier conflicts continue to plague the
    new Nation. See Letter from H. Knox to G. Washington
    (July 7, 1789), reprinted in 3 Papers of George Washington
    138 (W. Abbot 1989); see also Toler 433–434. Many early
    treaties thus “were treaties of peace and friendship, often
    providing for the restoration or exchange of prisoners” or
    including “mutual assistance pacts.” Cohen §1.03[1], at 25.
    Others dealt with passports and commercial affairs. Id., at
    25–26. And many attested to the tribes’ status as depend-
    ent nations, with the United States sometimes promising to
    protect the tribe. Id., at 26.
    Unlike the Confederation Congress, the new Federal
    Government was no longer powerless to maintain and en-
    force its treaties. Exercising its new military powers, the
    First Congress established a Department of War and vested
    Cite as: 
    599 U. S. ____
     (2023)             11
    THOMAS, J., dissenting
    the Department with authority over “Indian affairs.” See
    §1, 
    1 Stat. 50
    . War Secretary Henry Knox then called for,
    and obtained, “a line of garrisons in the Indian Country, in
    order to enforce the treaties and maintain the peace of the
    frontier.” F. Prucha, American Indian Policy in the Forma-
    tive Years 61 (1962) (Prucha, American Indian Policy).
    Those garrisons remained for years, working to prevent
    American settlers from illegally entering Indian country or
    otherwise stirring up conflicts. 
    Id.,
     at 61–63.
    Meanwhile, President Washington exercised his diplo-
    matic authority to maintain peace on the frontier. For ex-
    ample, when Pennsylvania settlers killed two members of
    the Seneca Nation, Washington appointed a federal agent
    to meet with the Seneca and “ ‘give the strongest assurances
    of the friendship of the United States towards that Tribe;
    and to make pecuniary satisfaction.’ ” Letter to T. Mifflin
    (Sept. 4, 1790), reprinted in 6 Papers of George Washington
    396 (D. Twohig ed. 1996). And, in line with his executive
    authority to “regulate all intercourse with foreign powers,”
    see 4 J. Elliot, Debates on the Constitution 126–127 (1863),
    Washington instructed Pennsylvania’s Governor to refer
    the Seneca “ ‘to the Executive of the United States, as pos-
    sessing the only authority of regulating an intercourse with
    them, and redressing their grievances,’ ” Letter to T. Mif-
    flin, in Papers of George Washington 396.
    Congress too did its part, enacting a series of acts “to reg-
    ulate Trade and Intercourse with the Indian Tribes, and to
    preserve Peace on the Frontiers.” See, e.g., 
    1 Stat. 469
    ; 
    2 Stat. 139
    ; 
    1 Stat. 137
     (emphasis deleted). Those “Trade and
    Intercourse Acts” underscored the Federal Government’s
    new powers and worked to establish a policy of peace and
    trade with Indian tribes. For example, the Acts threatened
    criminal penalties on any U. S. citizen who entered Indian
    lands and there committed crimes against Indians. See,
    e.g., 
    id., at 137
    ; see also Prucha, American Indian Policy
    188–193. Though opponents of those provisions contended
    12                     HAALAND v. BRACKEEN
    THOMAS, J., dissenting
    that they were unnecessary because state laws and some
    treaties already provided for criminal punishment, propo-
    nents explained that the provisions were needed for those
    who went “out of the limits of any of the States” and com-
    mitted crimes that may not have been covered by a partic-
    ular treaty. See 3 Annals of Cong. 751 (1792).3 Thus, as
    with the border garrisons, these provisions were meant as
    “an answer to the charge that” the United States did not
    respect its treaties with Indian tribes, Prucha 92, while also
    securing “peace with the Indian tribes” on the frontier, 3
    Annals of Cong. 751. In that respect, they were much like
    the criminal penalties that Congress levied on those who
    went abroad and enlisted with England or France and
    thereby threatened the United States’ peace with those na-
    tions. See 
    1 Stat. 383
    .
    The Trade and Intercourse Acts further hammered out
    the Nation’s diplomatic and territorial stance with respect
    to the Indian tribes. For example, reflecting the Federal
    Government’s powers over commerce, territories, and for-
    eign affairs, the Acts forbade U. S. citizens from purchas-
    ing, surveying, or settling on Indian lands. E.g., 
    id.,
     at 329–
    330. One of the Acts, enacted in 1796, then drew a bound-
    ary line with Indian tribes and required citizens to have
    passports when entering Indian lands. 
    Id., at 470
    . If an
    Indian came over the boundary line and committed a crime
    against a U. S. citizen, the Acts authorized the President to
    demand satisfaction from the tribe (while specifying that
    the Indian could be arrested “within the limits of any
    state”). See, e.g., §14, id., at 472–473. Then, to prevent the
    ——————
    3 As reflected in the debates on this statute, a majority of Congress
    thought that “the power of the General Government to legislate in all the
    territory belonging to the Union, not within the limits of any particular
    State, cannot be doubted; if the Government cannot make laws to re-
    strain persons from going out of the limits of any of the States, and com-
    mit murders and depredations, it would be in vain to expect any peace
    with the Indian tribes.” 3 Annals of Cong. 751.
    Cite as: 
    599 U. S. ____
     (2023)           13
    THOMAS, J., dissenting
    tribes from allying themselves with European powers, Con-
    gress forbade people from conveying messages to Indian
    tribes from foreign states. 
    2 Stat. 6
    .
    Congress also, of course, regulated trade with the Indian
    tribes. For example, the Acts continued the colonial prac-
    tice of requiring licenses to trade with Indians and threat-
    ened penalties on anyone who sold or purchased goods from
    Indians without a license. See, e.g., 
    1 Stat. 329
    –330. To
    facilitate trade, Congress also established a series of trad-
    ing houses on the frontiers, appropriating federal funds to
    set up the houses and purchase goods from Indians. See,
    e.g., 
    id., at 443
    , 453–454; 
    2 Stat. 173
    . And, “to promote civ-
    ilization” and secure the tribes’ “friendship,” Congress ap-
    propriated funds for the President to furnish gifts to the In-
    dians. See, e.g., §13, 
    1 Stat. 472
    .
    To be sure, these measures were not entirely successful,
    and the Federal Government’s policy was not always one of
    peace. American frontiersmen continued to push into In-
    dian lands, and the military garrisons sometimes could not
    stem the tide. See Prucha 62–63, 112. The Indians (often
    supported by the British) engaged in intermittent raids and
    attacks against American settlers, and the Federal Govern-
    ment and several confederated tribes fought a significant
    war in the Northwest Territories. 
    Id.,
     at 63–67; J. Yoo, Cri-
    sis and Command 75–79 (2011); M. Fletcher & W. Singel,
    Indian Children and the Federal-Tribal Trust Relationship,
    
    95 Neb. L. Rev. 885
    , 904–905 (2017) (Fletcher & Singel).
    Additionally, the Federal Government often played tribes
    against each other to obtain land concessions by treaty,
    leading many tribes (again goaded by the British) to take
    up arms against the United States in the War of 1812. See
    Cohen §1.03[3], at 39–41. In the aftermath of that conflict,
    Presidents Monroe and John Quincy Adams generally pur-
    sued a policy of assimilation or removing Indians west with
    their consent. Prucha, American Indian Policy 226–233.
    14                 HAALAND v. BRACKEEN
    THOMAS, J., dissenting
    That policy then gave way to a more forceful policy of re-
    moving Indians west, particularly during the administra-
    tion of President Andrew Jackson. Id., at 233–249; Cohen
    §1.03[4], at 41–51; Prucha 193–195, 239–240.
    But, at least until the War of 1812 (and, in large part, in
    the years after it), Founding-era Presidents’ primary goals
    in this area were to achieve peace with the Indians, sustain
    trade with them, and obtain Indian lands through treaties.
    See id., at 32–33, 59, 61, 93. By establishing a peaceful and
    trade-oriented relationship with the Indians, the new coun-
    try further hoped to exclude British Canada and other Eu-
    ropean powers that might seek alliances with the Indian
    tribes. See Cohen §1.03[3], at 37–38, n. 102; 
    2 Stat. 6
    . Dur-
    ing that time, the Federal Government’s relationship with
    the Indians thus remained (as it did for nearly the first hun-
    dred years of our Nation) “ ‘more an aspect of military and
    foreign policy’ ” than simple domestic law. See United
    States v. Lara, 
    541 U. S. 193
    , 201 (2004).
    C
    Notably, neither President Washington nor the first Con-
    gresses were particularly “concerned with the remnants of
    tribes that had been absorbed by the states and had come
    under their direction and control.” Prucha 92. The first
    Trade and Intercourse Acts specifically provided that “noth-
    ing in this act shall be construed to prevent any trade or
    intercourse with Indians living on lands surrounded by set-
    tlements of the citizens of the United States, and being
    within the jurisdiction of any of the individual states.” §13,
    
    1 Stat. 331
    ; §19, id., at 474. And the Constitution’s Appor-
    tionment Clause provided that representatives would be
    apportioned by the population of each State, “excluding In-
    dians not taxed”—implying that there were Indians who
    paid taxes and were incorporated into the bodies politic of
    the States. Art. I, §2, cl. 3.
    Cite as: 
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     (2023)                    15
    THOMAS, J., dissenting
    The States accordingly enacted numerous laws to regu-
    late Indians within their territorial boundaries, as well as
    those Indians’ interactions with the States’ citizens. See,
    e.g., D. Rosen, American Indians and State Law 34, 52
    (2007) (Rosen). For example, New York passed laws forbid-
    ding its citizens from suing to enforce contracts with Indi-
    ans who lived on Indian lands, and Virginia regulated the
    sale of land held by Indians. See Laws of the Colonial and
    State Governments, Relating to Indians and Indian Affairs,
    From 1633 to 1831, pp. 65–67, 158–159 (1832). Massachu-
    setts authorized its Governor to appoint guardians to over-
    see Indians and their property, while Ohio and Indiana for-
    bade the sale of liquor to Indians. 
    Id.,
     at 21–22, 232–234.
    On the whole, States also generally applied both their
    civil and criminal laws to Indians, with many extending
    their criminal laws to all Indians anywhere in the State—
    including, sometimes, on Indian reservations within the
    State. See Rosen 53; see also, e.g., Goodell v. Jackson ex
    dem. Smith, 
    20 Johns. 693
     (N. Y. Ct. Corr. Errors 1823);
    State v. Doxtater, 
    47 Wis. 278
    , 
    2 N. W. 439
     (1879) (collecting
    cases). To be sure, some of these laws may have conflicted
    with valid federal treaties or statutes on point, and courts
    at the time often did not precisely demarcate the constitu-
    tional boundaries between state and federal authority.
    Rosen 55–56.4 But, when opponents of the Trade and In-
    tercourse Acts’ criminal provisions complained that state
    ——————
    4 The Constitution expressly denied certain powers to States, including
    the power to “enter into any Treaty,” but it is silent on States’ relation-
    ship with Indians. See Art. I, §10; see also Letter from T. Jefferson to H.
    Knox (Aug. 10, 1791), in 22 Papers of Thomas Jefferson 27 (C. Cullen ed.
    1986) (noting that States lack “a right to Treat with the Indians”). To be
    sure, in 1832, this Court held that Georgia could not extend its laws over
    the territory held by the Cherokee Nation. See Worcester v. Georgia, 
    6 Pet. 515
    . However, that opinion “yielded to closer analysis,” and Indian
    reservations have since been treated as part of the State they are within.
    See Oklahoma v. Castro-Huerta, 
    597 U. S. ___
    , ___ (2022) (slip op., at 5)
    (internal quotation marks omitted).
    16                    HAALAND v. BRACKEEN
    THOMAS, J., dissenting
    laws would take care of criminal offenses, the provisions’
    proponents did not reply that state laws were disabled on
    this point—they instead noted that citizens might go be-
    yond the limits of States and commit crimes. See 3 Annals
    of Cong. 751. And notably, Congress’ early statutes did not
    purport to regulate Indians either on or off Indian lands—
    they instead regulated and penalized only U. S. citizens
    who were trading with Indians or committing acts on In-
    dian lands that threatened the peace with the tribes.
    Those statutory lines reflected the early dynamic of fed-
    eral-Indian relations, with Indian affairs counting as both
    a matter of quasi-foreign affairs and of state jurisdiction.
    For example, the early Trade and Intercourse Acts only de-
    manded satisfaction from Indian tribes if an Indian went
    onto a State’s land and committed a crime. E.g., 
    1 Stat. 472
    –473. Under that regime, the Federal Government as-
    serted no authority over the acts of Indians who lived on
    tribal lands—much less over Indians who lived off tribal
    lands and within a State’s sole jurisdiction.
    That general jurisdictional line held until 1817, when
    Congress first enacted a statute to impose penalties on an-
    yone who committed a crime against a U. S. citizen while
    on Indian lands. See 
    3 Stat. 383
    . But Justice McLean, rid-
    ing circuit, held that statute unconstitutional in 1834—at
    least as it applied to Indian lands located within the terri-
    torial limits of a State. See United States v. Bailey, 
    24 F. Cas. 937
     (No. 14,495) (CC Tenn.). As Justice McLean ex-
    plained, “[t]hat the federal government is one of limited
    powers, is a principle so obvious as not to admit of contro-
    versy.” 
    Id., at 938
    . Yet the Indian lands at issue were not
    located within a federal territory, and there had not been
    “any cession of jurisdiction by the state of Tennessee.” 
    Id., at 939
    .5 Nor was the criminal statute in any way related to
    ——————
    5 This decision thus was consistent with one issued 12 years later by
    this Court—which upheld the 1834 Trade and Intercourse Act’s criminal
    Cite as: 
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     (2023)                  17
    THOMAS, J., dissenting
    “commerce” with the Indian tribes. 
    Ibid.
     Indeed, Justice
    McLean asked, if Congress could enact this statute, “why
    may not [C]ongress legislate on crimes for the states gener-
    ally?” 
    Id., at 940
    . He concluded that Congress “trans-
    cended their constitutional powers” in asserting a general
    criminal jurisdiction over tribal lands within the limits of a
    State. 
    Ibid.
     And, given the limited nature of the Federal
    Government’s authority, state laws thus played a signifi-
    cant role in regulating Indians within the territorial limits
    of States. See 
    id., at 939
    .
    III
    The Constitution’s text and the foregoing history point to
    a set of discrete, enumerated powers applicable to Indian
    tribes—just as in any other context. Although our cases
    have at times suggested a broader power with respect to
    Indians, there is no evidence for such a free-floating author-
    ity anywhere in the text or original understanding of the
    Constitution. To the contrary, all of the Government’s early
    acts with respect to Indians are easily explicable under our
    normal understanding of the Constitution’s enumerated
    powers. For example, the Treaty Clause supported the Fed-
    eral Government’s treaties with Indians, and the Property
    Clause supported the gifts allocated to Indians. The powers
    to regulate territories and foreign affairs supported the reg-
    ulation of passports and penalties for criminal acts on In-
    dian lands. The various war-related powers supported mil-
    itary campaigns against Indian tribes. And the Commerce
    Clause supported the regulation of trade with Indian tribes.
    Moreover, the Founders deliberately chose to enumerate
    one power specific to Indian tribes: the power to regulate
    “Commerce” with tribes. Because the Constitution contains
    ——————
    provisions against a citizen of the United States, deemed not to be an
    Indian, who committed a crime on Indian lands within “a part of the ter-
    ritory of the United States, and not within the limits of any particular
    State.” United States v. Rogers, 
    4 How. 567
    , 571–572 (1846).
    18                 HAALAND v. BRACKEEN
    THOMAS, J., dissenting
    one Indian-specific power, there is simply no reason to
    think that there is some sort of free-floating, unlimited
    power over all things related to Indians. That is common
    sense: expressio unius est exclusio alterius. And that is par-
    ticularly true here, because the Founders adopted the “In-
    dian Commerce Clause” while rejecting an arguably
    broader authority over “Indian affairs.” See Adoptive Cou-
    ple, 
    570 U. S., at 662
    . Accordingly, here as elsewhere, the
    Federal Government can exercise only its constitutionally
    enumerated powers. Because each of those powers contains
    its own inherent limits, none of them can support an addi-
    tional unbounded power over all Indian-related matters.
    Indeed, the history of the plenary power doctrine in Indian
    law shows that, from its inception, it has been a power in
    search of a constitutional basis—and the majority opinion
    shows that this is still the case.
    A
    As the majority notes, some of the candidates that this
    Court has suggested as the source of the “plenary power”
    are the Treaty Clause, the Commerce Clause, and “princi-
    ples inherent in the Constitution’s structure.” See ante, at
    10–13; Lara, 
    541 U. S., at 200
    . But each of those powers
    has clear, inherent limits, and not one suggests any sort of
    unlimited power over Indian affairs—much less a power to
    regulate U. S. citizens outside of Indian lands merely be-
    cause those individuals happen to be Indians. I will discuss
    each in turn.
    1
    First, and most obviously, the Treaty Clause confers only
    the power to “make Treaties”; the Supremacy Clause then
    makes those treaties the supreme law of the land. Art. II,
    §2, cl. 2; Art. VI. Even under our most expansive Treaty
    Clause precedents, this power is still limited to actual trea-
    ties. See Bond v. United States, 
    572 U. S. 844
    , 854–855
    Cite as: 
    599 U. S. ____
     (2023)                        19
    THOMAS, J., dissenting
    (2014); 
    id.,
     at 893–894 (THOMAS, J., concurring in judg-
    ment) (the Treaty Power supports treaties only on matters
    of international intercourse); Missouri v. Holland, 
    252 U. S. 416
    , 433–435 (1920). It does not confer a free-floating
    power over matters that might involve a party to a treaty.
    2
    Second, the Commerce Clause confers only the authority
    “[t]o regulate Commerce . . . with the Indian Tribes.” Art. I,
    §8, cl. 3 (emphasis added). “At the time the original Consti-
    tution was ratified, ‘commerce’ consisted of selling, buying,
    and bartering, as well as transporting for these purposes.”
    United States v. Lopez, 
    514 U. S. 549
    , 585 (1995) (THOMAS,
    J., concurring); see also 1 S. Johnson, A Dictionary of the
    English Language 361 (4th rev. ed. 1773) (reprint 1978) (de-
    fining commerce as “Intercourse; exchange of one thing for
    another; interchange of any thing; trade; traffick”). And
    even under our most expansive Commerce Clause prece-
    dents, the Clause permits Congress to regulate only “eco-
    nomic activity” like producing materials that will be sold or
    exchanged as a matter of commerce. See Lopez, 
    514 U. S., at 560
    ; Gonzales v. Raich, 
    545 U. S. 1
    , 22 (2005).6
    The majority, however, suggests that the Commerce
    Clause could have a broader application with respect to In-
    dian tribes than for commerce between States or with for-
    eign nations. See ante, at 11, 16. That makes little textual
    sense. The Commerce Clause confers the power to regulate
    ——————
    6 Though the Court has only passingly discussed the Commerce
    Clause’s application to commerce with foreign nations, see Baston v.
    United States, 
    580 U. S. ___
    , ___ (2017) (THOMAS, J., dissenting from de-
    nial of certiorari) (slip op., at 3), it has still described that application in
    terms of economic measures like embargoes, see Atlantic Cleaners & Dy-
    ers, Inc. v. United States, 
    286 U. S. 427
    , 434 (1932); Buttfield v. Strana-
    han, 
    192 U. S. 470
    , 493 (1904). See also R. Barnett, The Original Mean-
    ing of the Commerce Clause, 
    68 U. Chi. L. Rev. 101
    , 113–116, 128 (2001)
    (collecting Founding-era sources that equate foreign commerce with
    trade).
    20                 HAALAND v. BRACKEEN
    THOMAS, J., dissenting
    a single object—“Commerce”—that is then cabined by three
    prepositional phrases: “with foreign Nations, and among
    the several States, and with the Indian Tribes.” Art. I, §8,
    cl. 3. Accordingly, one would naturally read the term “Com-
    merce” as having the same meaning with respect to each
    type of “Commerce” the Clause proceeds to identify. See
    Gibbons v. Ogden, 
    9 Wheat. 1
    , 74 (1824). I would think that
    is how we would read, for example, the President’s “ap-
    point[ment]” power with respect to “Ambassadors, . . .
    Judges of the supreme Court, and all other Officers of the
    United States.” Art. II, §2, cl. 2. There is no textual reason
    why the Commerce Clause would be different. Nor have the
    parties or the numerous amici presented any evidence that
    the Founders thought that the term “Commerce” in the
    Commerce Clause meant different things for Indian tribes
    than it did for commerce between States. See S. Prakash,
    Our Three Commerce Clauses and the Presumption of In-
    trasentence Uniformity, 
    55 Ark. L. Rev. 1149
    , 1161–1162
    (2003).
    Rather, the evidence points in the opposite direction. See
    Adoptive Couple, 
    570 U. S., at
    659–660 (THOMAS, J., concur-
    ring). When discussing “commerce” with Indian tribes, the
    Founders plainly meant buying and selling goods and
    transportation for that purpose. For example, President
    Washington once informed Congress of the need for “new
    channels for the commerce of the Creeks,” because “their
    trade is liable to be interrupted” by conflicts with England.
    Statement to the Senate (Aug. 4, 1790), reprinted in 4
    American State Papers 80. Henry Knox similarly referred
    to the “profits of this commerce” with the Creeks in the con-
    text of a “trading house which has the monopoly of the trade
    of the Creeks.” Report (July 6, 1789), reprinted in id., at
    15. And President Jefferson likewise discussed the “com-
    merce [that] shall be carried on liberally” at “trading
    houses” with Indians. Statement to Congress (Jan. 18,
    Cite as: 
    599 U. S. ____
     (2023)                      21
    THOMAS, J., dissenting
    1803), reprinted in 
    id., at 684
    .7 All of this makes sense,
    given that the Founders both wanted to facilitate trade with
    Indians and rejected a facially broader “Indian affairs”
    power in favor of a narrower power over “Commerce . . .
    with the Indian Tribes.”
    As noted above, that omission was not accidental; the Ar-
    ticles of Confederation had contained that “Indian affairs”
    language, and that language was twice proposed (and re-
    jected) at the Constitutional Convention. See Adoptive
    Couple, 
    570 U. S., at 662
    .8 Then, as today, “affairs” was a
    ——————
    7 See also Statement of T. Jefferson to Congress (Jan. 18, 1803), re-
    printed in 4 American State Papers 684–685 (Officers may “have confer-
    ences with the natives, on the subject of commercial intercourse; get ad-
    mission among them for our traders, as others are admitted; [and] agree
    on convenient deposites, for an interchange of articles . . . ”); Statement
    of T. Jefferson to Congress (Jan. 28, 1802), reprinted in 
    id., at 653
     (“I lay
    before you the accounts of our Indian trading houses . . . explaining the
    effects and the situation of that commerce . . . ”); Statement of S. Sibley
    et al. to Congress (Dec. 27, 1811), reprinted in 
    id.,
     at 780–782 (in the
    Northwest Territory, formerly “[t]here was trade and commercial inter-
    course; no agriculture,” but “[a]t present, the little commerce which re-
    mains is sufficiently safe. It is agricultural protection which is wanted”);
    Letter from J. Mason to W. Eustis (Jan. 16, 1812), reprinted in 
    id.,
     at
    782–784 (“[P]eltries (deer skins) are in most part received from the Indi-
    ans . . . . The market is on the continent of Europe. Since the obstruc-
    tions to our commerce in that quarter, peltries have not only experienced
    a depression in price . . . ”); Protest by J. Hendricks, J. Jackson, & J.
    Simms (June 28, 1796), reprinted in 
    id.,
     at 613–614 (“No citizen is to be
    permitted to sell, or furnish by gift, spirituous liquors to the Indians, or
    to have any commercial traffic with them”); see also Natelson 214–215.
    Even one Founder who appears to have used the term more loosely (in
    the context of an opinion on the constitutionality of a national bank) fo-
    cused only on trade and immigration restrictions. Letter from E. Ran-
    dolph to G. Washington (Feb. 12, 1791), in 7 Papers of George Washing-
    ton: Presidential Series 330, 334–335 (D. Twohig ed. 1998) (“The heads
    of [the commerce] power with respect to the Indian Tribes are 1. to pro-
    hibit the Indians from coming into, or trading within, the United States.
    2. to admit them with or without restrictions. 3. to prohibit citizens of
    the United States from trading with them; or 4. to permit with or without
    restrictions”).
    8 To be sure, as respondents point out, the Constitution removed two
    22                      HAALAND v. BRACKEEN
    THOMAS, J., dissenting
    broader term than “commerce,” with “affairs” more gener-
    ally referring to things to be done.9 Thus, whatever the pre-
    cise contours of a freestanding “Indian Affairs” Clause
    might have been, the Founders’ specific rejection of such a
    ——————
    limits on the Indian-affairs power found in the Articles of Confederation:
    that the Indians not be “members of any of the States,” and that no
    State’s “legislative right . . . within its own limits be . . . infringed.” See
    Brief for Federal Parties 12–13. But removing those two limits in the
    Indian context cannot simultaneously expand the very meaning of “com-
    merce,” particularly because the Commerce Clause operates on two ob-
    jects beyond Indian tribes. The Constitution’s changes in this regard are
    thus best understood as narrowing the subject matter of Congress’ power
    while omitting external constraints on that power.
    9 Compare F. Allen, A Complete English Dictionary (1765) (Allen)
    (“something done,” or “the concerns and transactions of a nation”); 1 S.
    Johnson, Dictionary of the English Language (6th ed. 1785) (Johnson);
    N. Bailey, A Universal Etymological English Dictionary (26th ed. 1789)
    (Bailey), with Allen (“the exchange of commodities, or the buying and
    selling [of] merchandize both at home and abroad; intercourse of any
    kind”); Johnson (similar); Bailey (similar).
    Indeed, when the Founders referred to Indian “affairs,” they were often
    referring to diplomatic relations—going far afield of their references to
    Indian “commerce.” E.g., G. Washington to Congress (Mar. 26, 1792), in
    4 American State Papers 225 (referring to “the present crisis of affairs”
    with Indians and “managing the affairs of the Indian tribes” in a general
    sense, including inviting the Five Nations to the seat of the Federal Gov-
    ernment and giving presents to the tribes); Report from H. Knox (Nov. 7,
    1792), in id., at 225 (referring to “the subject of Indian Affairs” in the
    context of measures “to procure a peace with the Indians” and troops);
    Natelson 217–218 (detailing preconstitutional references to the Depart-
    ment of Indian Affairs). As noted above, Congress tasked the War De-
    partment with duties “relative to Indian affairs.” §1, 
    1 Stat. 50
    . And a
    Committee of the Continental Congress once remarked that “the princi-
    pal objects” of that Congress’ power of “managing affairs with” Indians
    had encompassed “making war and peace, purchasing certain tracts of
    their land, fixing the boundaries between them and our people, and pre-
    venting the latter [from] settling on lands left in possession of the for-
    mer.” 33 Journals of the Continental Congress 458 (1936 ed.). Of course,
    it may be that the Constitution’s other enumerated powers authorized
    many of those “objects.” But, whatever the precise bounds of an “Indian
    affairs” power, it was decidedly broader than a power over Indian “com-
    merce.”
    Cite as: 
    599 U. S. ____
     (2023)                    23
    THOMAS, J., dissenting
    power shows that there is no basis to stretch the Commerce
    Clause beyond its normal limits.10
    3
    Third, the “structural principles” that the majority points
    to are only the foreign-affairs powers that the Constitution
    provides more generally. See Lara, 
    541 U. S., at
    201 (citing
    Curtiss-Wright, 
    299 U. S., at
    315–322). As detailed above,
    the Constitution plainly confers foreign-affairs powers on
    the Federal Government to regulate passports, offenses
    against the laws of nations, and citizens’ acts abroad that
    threaten the Nation’s peace. S. Prakash & M. Ramsey, The
    Executive Power Over Foreign Affairs, 111 Yale L. J. 231,
    298–332 (2001). Those powers were brought to bear on In-
    dian tribes, with whom the Federal Government main-
    tained a government-to-government relationship. See, e.g.,
    Cohen §1.03[1], at 25–26; 
    1 Stat. 470
     (passports on Indian
    lands); 
    id., at 137
     (crimes on Indian lands); 
    id., at 383
     (en-
    listing with foreign states).
    ——————
    10 The historical record thus provides scant support for the view, advo-
    cated by some scholars, that the term “commerce” meant (in the context
    of Indians) all interactions with Indians. E.g., G. Ablavsky, Beyond the
    Indian Commerce Clause, 124 Yale L. J. 1012, 1028–1032 (2015) (Ablav-
    sky). The main evidence for that view appears to be (1) a few, fairly iso-
    lated references to “commerce” outside the context of trade, usually in
    the context of sexual encounters, (2) the fact that one definition of “com-
    merce” was “intercourse” at the Founding, and (3) the fact that trade
    with Indians, at the Founding, had political significance. 
    Ibid.
     But, as
    noted above, the Founders repeatedly used the term “commerce” when
    discussing trade with Indians. And just because that trade had political
    significance surely does not mean that all things of political significance
    were “commerce.” Nor is the definition of “commerce” as “intercourse”
    instructive, because dictionaries from the era also defined “intercourse”
    as “commerce.” E.g., Johnson; Allen. Even some of these same scholars
    concede that the Founders overwhelmingly discussed “trade” with Indi-
    ans—far more than either “intercourse” or “commerce” with them. See
    Ablavsky 1028, n. 81. And, again, when the Founders did discuss “com-
    merce” specifically, they did so almost entirely in the context of trade.
    See supra, at 20–21, and n. 7.
    24                      HAALAND v. BRACKEEN
    THOMAS, J., dissenting
    But that authority is a foreign, not domestic, affairs
    power. It comprehends external relations, like matters of
    war, peace, and diplomacy—not internal affairs like adop-
    tion proceedings. The Court made that point explicit in
    Curtiss-Wright: The “power over external affairs [is] in
    origin and essential character different from that over in-
    ternal affairs.” 
    299 U. S., at 319
    ; see also Youngstown Sheet
    & Tube Co. v. Sawyer, 
    343 U. S. 579
    , 635, n. 2 (1952) (Jack-
    son, J., concurring in judgment and opinion of Court) (rec-
    ognizing this distinction). For external affairs, the Consti-
    tution grants the Federal Government a wider authority;
    but for internal affairs, the Constitution provides fewer,
    more discrete powers. See, e.g., Curtiss-Wright, 
    299 U. S., at 315, 319
    ; Zivotofsky, 576 U. S., at 34–35 (opinion of
    THOMAS, J.).
    Again, all those limits dovetail with the historical prac-
    tices of the Founding era. As discussed above, the Found-
    ing-era Government undertook a wide array of measures
    with respect to Indian tribes. But, apart from measures
    dealing with commerce, most (if not all) of the Federal Gov-
    ernment’s actions toward Indians either treated them as
    sovereign entities or regulated citizens on Indian lands who
    might threaten to breach treaties with Indians or otherwise
    disrupt the peace.11 For example, early treaties that dealt
    ——————
    11 The closest possible exception from this era was a provision in the
    Trade and Intercourse Act of 1822 (later enacted in the Act of 1834),
    which provided that, “in all trials about the right of property in which
    Indians shall be party on one side and white persons on the other, the
    burden of proof shall rest upon the white person, in every case in which
    the Indian shall make out a presumption of title in himself from the fact
    of previous possession and ownership.” §4, 
    3 Stat. 683
    ; §22, 
    4 Stat. 733
    .
    But even that statute appears to be merely part of the general “design”
    of the Acts: to “protect the rights of Indians to their properties” “[b]ecause
    of recurring trespass upon and illegal occupancy of Indian territory” by
    frontier settlers. See Wilson v. Omaha Tribe, 
    442 U. S. 653
    , 664 (1979).
    Viewed as such, this unremarkable provision only furthered the foreign-
    affairs and commerce powers of the Federal Government by preventing
    Cite as: 
    599 U. S. ____
     (2023)                 25
    THOMAS, J., dissenting
    with questions of peace and war plainly involved some sort
    of sovereign-to-sovereign relationship. See, e.g., Treaty
    with the Cherokees (1791), 
    7 Stat. 39
    . And the early Trade
    and Intercourse Acts regulated only the criminal conduct of
    U. S. citizens on Indian lands.
    This congruence—between the government’s actions and
    the Constitution’s enumerated powers—likely reflects the
    fact that those powers, collectively, responded to the most
    pressing concerns of the day: that Congress could not en-
    force its treaties with Indians, police the frontier, or regu-
    late unscrupulous traders—all of which caused violence
    and raised the specter of war with Indian tribes. As noted,
    when Congress tried to expand its domain in 1817 to regu-
    late the criminal acts of Indians, one Justice of this Court
    found it to be a palpable violation of Congress’ limited pow-
    ers. See Bailey, 24 F. Cas., at 938–940. And, all the while,
    States continued to regulate matters relating to Indians
    within their territorial limits. The normal federalist dy-
    namic thus extended to the domain of Indian affairs: The
    Federal Government was supreme with respect to its enu-
    merated powers, but States retained all residual police pow-
    ers within their territorial borders. See id., at 938–939;
    McCulloch, 
    4 Wheat., at 405
    . And the Federal Govern-
    ment’s enumerated powers were not unlimited, but con-
    fined to their plain meaning and limits.
    B
    So where did the idea of a “plenary power” over Indian
    affairs come from? As it turns out, little more than ipse
    dixit. The story begins with loose dicta from Cherokee Na-
    tion v. Georgia, 
    5 Pet. 1
     (1831). In that case, the Cherokee
    Nation petitioned this Court for an injunction to prevent
    Georgia from enforcing state laws in Cherokee territory and
    from seizing Cherokee lands. 
    Id., at 11
    . The Tribe asserted
    ——————
    non-Indians from stealing Indian lands, circumventing Congress’ trade-
    licensing scheme, and disrupting the peace with Indian tribes.
    26                     HAALAND v. BRACKEEN
    THOMAS, J., dissenting
    that Article III both allowed the suit and gave this Court
    original jurisdiction because the suit was one by a “foreign
    Stat[e]” against the State of Georgia. §2, cls. 1–2. Writing
    for the Court, Chief Justice Marshall admitted that the
    Tribe’s argument was “imposing”: The Tribe was “a state,
    as a distinct political society,” but it was “not a state of the
    union.” 
    5 Pet., at 16
    . Nonetheless, the Court refused to
    hear the case. As Marshall reasoned, Indian tribes were
    not “foreign state[s] in the sense of the constitution,” as
    shown in part by the Commerce Clause’s delineation of
    States, foreign nations, and Indian tribes.12 
    Ibid.
     Rather,
    Marshall reasoned that the Indian tribes occupied a unique
    status, which he characterized as that of “domestic depend-
    ent nations” whose “relation to the United States resembles
    that of a ward to his guardian.” 
    Id., at 17
    .
    Other than this opinion, I have been unable to locate any
    evidence that the Founders thought of the Federal Govern-
    ment as having a generalized guardianship-type relation-
    ship with the Indian tribes—much less one conferring any
    congressional power over Indian affairs. To the contrary,
    such a status seems difficult to square with the relationship
    between the Federal Government and tribes, which at
    times involved warfare, not trust. See, e.g., Fletcher &
    Singel 904–907; F. Hutchins, Tribes and the American Con-
    stitution 104 (2000). And, if such a general relationship ex-
    isted, there would seem to be little need for the Federal Gov-
    ernment to have ratified specific treaties with tribes calling
    for federal protection. E.g., Treaty with the Kaskaskia
    (1803), 
    7 Stat. 78
    ; Treaty with the Creeks (1790), 
    id., at 35
    .
    At bottom, Cherokee Nation’s loose dicta cannot support a
    broader power over Indian affairs.
    ——————
    12 In dissent, Justice Thompson reasoned that the reference to “Indian
    tribes” was meant only to ensure that the Federal Government could reg-
    ulate commerce with tribes, which were often subunits of Indian nations.
    Accordingly, he concluded that Indian nations were “ ‘foreign states’ ” un-
    der Article III. Cherokee Nation, 
    5 Pet., at 64
    .
    Cite as: 
    599 U. S. ____
     (2023)           27
    THOMAS, J., dissenting
    Nevertheless, Cherokee Nation’s suggestion was picked
    up decades later in United States v. Kagama, 
    118 U. S. 375
    (1886)—the first case to actually apply a broader, unenu-
    merated power over Indian affairs. In Kagama, the Court
    considered the Major Crimes Act of 1885, which, similar to
    the 1817 Act held unconstitutional by Justice McLean while
    riding circuit, regulated crimes on Indian lands committed
    by Indians; the Major Crimes Act differed from the 1817 Act
    only in that it extended to crimes committed against other
    Indians. See §9, 
    23 Stat. 385
    . Similarly to Justice
    McLean’s Bailey opinion, the Court first rejected the idea
    that the Commerce Clause could support the Act—reason-
    ing that “it would be a very strained construction of th[e]
    clause, that a system of criminal laws for Indians . . . was
    authorized by the grant of power to regulate commerce with
    the Indian tribes.” Kagama, 
    118 U. S., at
    378–379.
    But the Court determined that the Major Crimes Act was
    constitutional nevertheless. As the Court first noted, the
    Act was “confined to the acts of an Indian of some tribe, of
    a criminal character, committed within the limits of the res-
    ervation.” 
    Id., at 383
    . The Court then cited several cases
    arising from congressional regulations of Indian lands lo-
    cated within federal territories, noting that Congress had
    previously punished offenses committed on such lands. See
    
    id.,
     at 380 (citing United States v. Rogers, 
    4 How. 567
    , 572
    (1846); Murphy v. Ramsey, 
    114 U. S. 15
    , 44 (1885); Ameri-
    can Ins. Co. v. 356 Bales of Cotton, 
    1 Pet. 511
    , 542 (1828)).
    Next, the Court reasoned that the Act “does not interfere
    with the process of the State courts within the reservation,
    nor with the operation of State laws upon white people
    found there.” 
    118 U. S., at 383
    . Instead, the Act’s “effect[s
    are] confined to the acts of an Indian of some tribe, of a
    criminal character, committed within the limits of the res-
    ervation.” 
    Ibid.
    That sort of language seems to view Indian lands as akin
    to quasi-federal lands or perhaps “external” to the Nation’s
    28                    HAALAND v. BRACKEEN
    THOMAS, J., dissenting
    normal affairs. But nothing the Court cited actually sup-
    ported such a view. For example, the fact that the Federal
    Government could regulate Indians on federal territories
    does not justify such regulations for Indians within a
    State’s limits. Nor does the fact that tribes were “external”
    at the Founding mean that they remained “external” in
    1886.13 Nor does the fact that Congress could regulate citi-
    zens who went onto Indian lands, see Rogers, 
    4 How., at 572
    , mean that Congress automatically has the power to
    regulate Indians on those lands.
    But the Court then subtly shifted its approach. Drawing
    on Cherokee Nation, the Court next asserted that “Indian
    tribes are the wards of the nation.” Kagama, 
    118 U. S., at 383
     (emphasis in original). Because of “their very weakness
    and helplessness,” it reasoned, “so largely due to the course
    of dealing of the Federal Government with them and the
    treaties in which it has been promised, there arises the duty
    of protection, and with it the power.” 
    Id., at 384
    . This
    power “over th[e] remnants” of the Indian tribes, the Court
    stated, “must exist in [the federal] government, because it
    never has existed anywhere else,” “because it has never
    been denied, and because it alone can enforce its laws on all
    the tribes.” 
    Id.,
     at 384–385.
    These pronouncements, however, were pure ipse dixit.
    The Court pointed to nothing in the text of the Constitution
    or its original understanding to support them. Nor did the
    Court give any other real support for those conclusions; in-
    stead, it cited three cases, all of which held only that States
    were restricted in certain ways from governing Indians on
    Indian lands. 
    Id.,
     at 384 (citing Worcester v. Georgia, 
    6 Pet. 515
     (1832); Fellows v. Blacksmith, 
    19 How. 366
     (1856) (only
    the Federal Government, not private parties, can enforce
    ——————
    13 As discussed more below, Congress declared in 1871 that “hereafter
    no Indian nation or tribe within the territory of the United States shall
    be acknowledged or recognized as an independent nation, tribe, or power
    with whom the United States may contract by treaty.” 
    16 Stat. 566
    .
    Cite as: 
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     (2023)           29
    THOMAS, J., dissenting
    removal treaties); The Kansas Indians, 
    5 Wall. 737
     (1867)
    (States cannot tax Indian lands)). It does not follow from
    those cases that the Federal Government has any addi-
    tional authority with regard to Indians—much less a
    sweeping, unbounded authority over all matters relating to
    Indians. Cf. Worcester, 
    6 Pet., at 547
     (suggesting that tribes
    had long been left to regulate their internal affairs). At
    each step, Kagama thus lacked any constitutional basis.
    Nonetheless, in the years after Kagama, this Court
    started referring to a “plenary power” or “plenary author-
    ity” that Congress possessed over Indian tribes, as well as
    a trust relationship with the Indians. See, e.g., Stephens v.
    Cherokee Nation, 
    174 U. S. 445
    , 478 (1899); Lone Wolf v.
    Hitchcock, 
    187 U. S. 553
    , 565 (1903); Winton v. Amos, 
    255 U. S. 373
    , 391 (1921). And, in the decades since, this Court
    has increasingly gestured to such a plenary power, usually
    in the context of regulating a tribal government or tribal
    lands, while conspicuously failing to ground the power in
    any constitutional text and cautioning that the power is not
    absolute. See, e.g., ante, at 13 (noting this problem); United
    States v. Alcea Band of Tillamooks, 
    329 U. S. 40
    , 54 (1946)
    (opinion of Vinson, C. J.); Santa Clara Pueblo v. Martinez,
    
    436 U. S. 49
    , 56–57 (1978).
    The majority’s opinion today continues in that vein—only
    confirming its lack of any constitutional basis. Like so
    many cases before it, the majority’s opinion lurches from
    one constitutional hook to another, not quite hanging the
    idea of a plenary power on any of them, while insisting that
    the plenary power is not absolute. See ante, at 10–13.
    While I empathize with the majority regarding the confu-
    sion that Kagama and its progeny have engendered, I can-
    not reflexively reaffirm a power that remains in search of a
    constitutional basis. And, while the majority points to a few
    actual constitutional provisions, like the Commerce and
    Treaty Clauses, those provisions cannot bear the weight
    that our cases have placed upon them.
    30                 HAALAND v. BRACKEEN
    THOMAS, J., dissenting
    At bottom, Kagama simply departed from the text and
    original meaning of the Constitution, which confers only the
    enumerated powers discussed above. Those powers are not
    boundless and did not operate differently with respect to
    Indian tribes at the Founding; instead, they conferred all
    the authority that the new Federal Government needed at
    the time to deal with Indian tribes. When dealing with In-
    dian affairs, as with any other affairs, we should always
    evaluate whether a law can be justified by the Constitu-
    tion’s enumerated powers, rather than pointing to amor-
    phous powers with no textual or historical basis.
    IV
    Properly understood, the Constitution’s enumerated pow-
    ers cannot support ICWA. Not one of those powers, as orig-
    inally understood, comes anywhere close to including the
    child custody proceedings of U. S. citizens living within the
    sole jurisdiction of States. Moreover, ICWA has no consti-
    tutional basis even under Kagama and later precedents.
    While those cases have extended the Federal Government’s
    Indian-related powers beyond the original understanding of
    the Constitution, this Court has never extended them far
    enough to support ICWA. Rather, virtually all of this
    Court’s modern Indian-law precedents—upholding laws
    that regulate tribal lands, tribal governments, and com-
    merce with tribes—can be understood through a core con-
    ceptual framework that at least arguably corresponds to
    Founding-era practices. To extend those cases to uphold
    ICWA thus would require ignoring the context of those
    precedents, treating their loose “plenary power” language
    as talismanic, and transforming that power into the truly
    unbounded, absolute power that they disclaim. The basic
    premise that the powers of the Federal Government are
    limited and defined should counsel against taking that step.
    Cite as: 
    599 U. S. ____
     (2023)            31
    THOMAS, J., dissenting
    A
    ICWA lacks any foothold in the Constitution’s original
    meaning. Most obviously, ICWA has no parallel from the
    Founding era; it regulates the child custody proceedings of
    U. S. citizens in state courts—not on Indian lands—merely
    because the children involved happen to be Indians. No law
    from that time even came close to asserting a general police
    power over citizens who happened to be Indians—by, for ex-
    ample, regulating the acts of Indians who were also citizens
    and who lived within the sole jurisdiction of States (and not
    on Indian lands). If nothing else, the dearth of Founding-
    era laws even remotely similar to ICWA should give us
    pause.
    Nor can ICWA find any support in the Constitution’s enu-
    merated powers as originally understood. I take those pow-
    ers in turn: First, the Property Clause cannot support
    ICWA because ICWA is not based on the disposition of fed-
    eral property and is not limited to federal lands; in fact, the
    Federal Government owns very little Indian land. See Sta-
    tistical Record of Native North Americans 1054 (M. Reddy
    ed. 1993); S. Prakash, Against Tribal Fungibility, 89 Cor-
    nell L. Rev. 1069, 1092–1093 (2004).
    Second, the Treaty Clause cannot support ICWA because
    no one has identified a treaty that governs child custody
    proceedings—much less a treaty with each of the 574 feder-
    ally recognized tribes to which ICWA applies. 
    25 U. S. C. §§1903
    (3), (8); 
    86 Fed. Reg. 7554
     (2021). Nor could they;
    Congress declared an end to treaty-making with Indian
    tribes in 1871, and it appears that well over half of the
    tribes lack any treaty with the Federal Government. See
    
    16 Stat. 566
    ; Brief for Tribal Defendants 37–38; see also
    generally Vols. 1–2 C. Kappler, Indian Affairs: Laws and
    Treaties (2d ed. 1902, 1904). And, in part because one Con-
    gress can never bind a later Congress, the Federal Govern-
    ment retains the power to abrogate treaties and has done
    so for at least some Indian treaties. E.g., Lone Wolf, 187
    32                     HAALAND v. BRACKEEN
    THOMAS, J., dissenting
    U. S., at 566; accord, La Abra Silver Mining Co. v. United
    States, 
    175 U. S. 423
    , 460 (1899); 1 W. Blackstone, Com-
    mentaries on the Laws of England 90 (1765) (Blackstone).
    Whatever number of treaties remain in force, they cannot
    justify ICWA.
    Third, the Commerce Clause cannot support ICWA. As
    originally understood, the Clause confers a power only over
    buying and selling, not family law and child custody dis-
    putes. Even under our more modern, expansive precedents,
    the Clause is still limited to only “economic activity” and
    cannot support the regulation of core domestic matters like
    family or criminal laws. See Lopez, 
    514 U. S., at 560
    ;
    United States v. Morrison, 
    529 U. S. 598
    , 610–611 (2000);
    National Federation of Independent Business v. Sebelius,
    
    567 U. S. 519
    , 552 (2012) (opinion of ROBERTS, C. J.); 
    id., at 657
     (Scalia, J., dissenting).14 And even Kagama itself re-
    jected the Commerce Clause as a basis for any sort of ex-
    pansive power over Indian affairs. 
    118 U. S., at
    378–379.
    Therefore, nothing about that Clause supports a law, like
    ICWA, governing child custody disputes in state courts.
    Fourth, the Federal Government’s foreign-affairs powers
    cannot support ICWA. For today’s purposes, I will assume
    that some tribes still enjoy the same sort of pre-existing sov-
    ereignty and autonomy as tribes at the Founding, thereby
    establishing the sort of quasi-foreign, government-to-gov-
    ernment relationship that appears to have defined those
    powers at the Founding. Even so, the foreign-affairs pow-
    ——————
    14 Respondents insist that Lopez and Morrison did not hold that family
    law is insulated from federal law. But that misses the point. Lopez and
    Morrison held that the Commerce Clause cannot regulate a matter like
    family law, and they did not consider whether some other constitutional
    power might do so. Cf. Hillman v. Maretta, 
    569 U. S. 483
    , 490–491, 497
    (2013) (finding pre-emption of a state statute regarding beneficiaries and
    a change in marital status under a federal statute regulating the life in-
    surance of federal employees). Here, no such independent power is to be
    found.
    Cite as: 
    599 U. S. ____
     (2023)                   33
    THOMAS, J., dissenting
    ers can operate only externally, in the context of lands un-
    der the purview of another sovereign (like Indian tribal
    lands) or in the context of a government-to-government re-
    lationship (such as matters of diplomacy or peace). See
    Curtiss-Wright, 
    299 U. S., at 315, 319
    . But regulating child
    custody proceedings of citizens within a State is the para-
    digmatic domestic situation; the Federal Government
    surely could not apply its foreign-affairs powers to the do-
    mestic family-law or criminal matters of any other citizens
    merely because they happened to have citizenship or ances-
    tral connections with another nation.15 Apart from the sin-
    gle provision that allows tribal governments jurisdiction
    over proceedings for Indians on tribal lands, see §1911(a),
    ICWA is completely untethered from any external aspect of
    our Nation that could somehow implicate these powers.
    That should be the end of the analysis. Again, as the ma-
    jority notes, our Federal Government has only the powers
    that the Constitution enumerates. See ante, at 10–11;
    McCulloch, 
    4 Wheat., at 405
    . Not one of those enumerated
    powers justifies ICWA. Therefore, it has no basis whatso-
    ever in our constitutional system.
    B
    Even taking our “plenary power” precedents as given (as
    ——————
    15 Indeed, ICWA stands in sharp contrast to statutes regarding inter-
    national adoptions, in accordance with the Hague Convention. Those
    statutes generally regulate only adoptions by a foreign parent of a child
    residing in the United States, or vice versa. E.g., 
    114 Stat. 825
    ; 
    42 U. S. C. §§14931
    , 14932. In other words, there is a cross-border compo-
    nent; the statutes do not regulate adoption proceedings merely because
    the child’s parents are, for example, dual Mexican-American citizens or
    dual Irish-American citizens. For ICWA to be comparable to those stat-
    utes, it could regulate only the adoption of children who reside on an
    Indian reservation by parents who live within the sole jurisdiction of a
    State, or vice versa. While I take no position on whether such a more
    limited law would be constitutional, that stark difference only under-
    scores ICWA’s lack of any external focus.
    34                 HAALAND v. BRACKEEN
    THOMAS, J., dissenting
    the majority seems to do for purposes of these cases), noth-
    ing in those precedents supports ICWA. To be sure, this
    Court has repeatedly used loose language concerning a “ple-
    nary power” and “trust relationship” with Indians, and that
    language has been taken by some to displace the normal
    constitutional rules. See ante, at 10–15. But, even taken
    to their new limits, the Court’s precedents have upheld only
    a variety of laws that either regulate commerce with Indi-
    ans or deal with Indian tribes and their lands. Despite cit-
    ing a veritable avalanche of precedents, respondents have
    failed to identify a single case where this Court upheld a
    federal statute comparable to ICWA.
    As noted above, Kagama was careful to note that the Ma-
    jor Crimes Act at issue was “confined to the acts of an In-
    dian of some tribe, of a criminal character, committed
    within the limits of the reservation.” 
    118 U. S., at 383
    . In
    that vein, the opinion cited cases arising from congressional
    regulations of Indian lands located within Federal Territo-
    ries. See 
    id.,
     at 380 (citing Rogers, 
    4 How., at 572
    ; citing
    Murphy, 
    114 U. S., at 44
    , and 356 Bales of Cotton, 
    1 Pet., at 542
    ). In other words, it is possible that Kagama viewed
    Congress as having the power to regulate crimes by Indians
    on Indian lands because those lands remained in a sense
    “external” to the Nation’s normal affairs and akin to quasi-
    federal lands.
    Again, that would be a non sequitur. Nevertheless, at a
    high level, it is possible to see how Kagama was rooted in
    the same foreign-affairs and territorial powers that author-
    ized much of the early Trade and Intercourse Acts (and
    which Congress may have relied upon when passing the
    1817 Act). See Cohen §5.01[4], at 390, and nn. 47, 48 (link-
    ing Kagama with Curtiss-Wright, 
    299 U. S., at 318
    ); United
    States v. Wheeler, 
    435 U. S. 313
    , 323 (1978) (describing In-
    dian tribes as possessing a pre-existing sovereignty, apart
    from the United States). And, viewed in that light, it would
    Cite as: 
    599 U. S. ____
     (2023)             35
    THOMAS, J., dissenting
    make sense to limit Kagama to that conceptual root, treat-
    ing regulations of tribal lands and tribal governments as
    “external” to the normal affairs of the Nation.
    Indeed, such a line explains almost all of the myriad cases
    that respondents have cataloged as showing an unqualified
    power over Indian affairs. See, e.g., Michigan v. Bay Mills
    Indian Community, 
    572 U. S. 782
    , 789 (2014) (tribal gov-
    ernment’s sovereign immunity); Cherokee Nation v. Hitch-
    cock, 
    187 U. S. 294
    , 299, 308 (1902) (federal approval of
    mining leases on tribal lands); Stephens, 
    174 U. S., at
    476–
    477 (federal court in Indian territory). Many, for example,
    dealt with federal laws that purported to diminish a tribe’s
    territory or jurisdiction. South Dakota v. Yankton Sioux
    Tribe, 
    522 U. S. 329
     (1998); Negonsott v. Samuels, 
    507 U. S. 99
     (1993); Washington v. Confederated Bands and Tribes of
    Yakima Nation, 
    439 U. S. 463
     (1979); United States v.
    Hellard, 
    322 U. S. 363
     (1944). Others dealt with state taxes
    on Indian lands. See, e.g., Cotton Petroleum Corp. v. New
    Mexico, 
    490 U. S. 163
     (1989); Bryan v. Itasca County, 
    426 U. S. 373
     (1976); Board of County Comm’rs v. Seber, 
    318 U. S. 705
     (1943); Choate v. Trapp, 
    224 U. S. 665
     (1912).
    Others still have permitted the Federal Government to di-
    minish a tribe’s self-government. See Santa Clara Pueblo,
    
    436 U. S., at
    56–57. And yet others, in Kagama’s direct lin-
    eage, dealt with crimes on Indian lands. See, e.g., Lara, 
    541 U. S., at 200
    ; see also, e.g., United States v. Cooley, 
    593 U. S. ___
    , ___ (2021) (slip op., at 1); Wheeler, 
    435 U. S., at
    323–
    324.
    In doing so, some of those criminal law cases reasoned
    that the Double Jeopardy Clause permits separate punish-
    ments by tribal governments and the Federal Government
    because of the tribe’s separate sovereignty, underscoring
    Kagama’s conceptual root. See, e.g., Cooley, 593 U. S., at
    ___ (slip op., at 1); Lara, 
    541 U. S., at 200
    . And, along the
    way, at least some of these cases clarified, like Kagama,
    36                 HAALAND v. BRACKEEN
    THOMAS, J., dissenting
    that they dealt not with “Indians who have left or never in-
    habited reservations set aside for their exclusive use or who
    do not possess the usual accoutrements of tribal self-gov-
    ernment,” but only with Indians residing on Indian lands.
    McClanahan v. Arizona Tax Comm’n, 
    411 U. S. 164
    , 167–
    168 (1973); accord, Fisher v. District Court of Sixteenth Ju-
    dicial Dist. of Mont., 
    424 U. S. 382
    , 383 (1976) (per curiam)
    (dealing with “an adoption proceeding in which all parties
    are members of the Tribe and residents of the Northern
    Cheyenne Indian Reservation”); United States v. Algoma
    Lumber Co., 
    305 U. S. 415
    , 417 (1939) (regulations of “con-
    tracts for the sale of timber on land of the Klamath Indian
    Reservation”). In case after case, the law at issue purported
    to reach only tribal governments or tribal lands, no more.
    To be sure, applying Kagama’s conceptual framework ul-
    timately reveals a catch-22 of sorts: If Congress regulates
    tribal governments as a matter of external affairs, then
    such regulation seems to undercut the very tribal sover-
    eignty that serves as the basis for that congressional power.
    See Lara, 
    541 U. S., at
    214–215 (THOMAS, J., concurring in
    judgment). But that appears to be a hallmark of Kagama
    and its progeny, not a peculiarity. As Chief Justice Mar-
    shall once stated, Indians are neither wholly foreign nor
    wholly domestic, but are instead “domestic dependent na-
    tions,” akin to “ ‘[t]ributary’ ” states. Worcester, 
    6 Pet., at 561
    ; Cherokee Nation, 
    5 Pet., at
    16–17. It may be that this
    contradiction is simply baked into our Indian jurispru-
    dence. And, in any event, recognizing the proper conceptual
    root for these precedents makes the most sense of them as
    a textual and original matter—and it is surely preferable to
    continuing along this meandering and ill-defined path.
    Yet, even confining Kagama’s conceptual error to its
    roots, the majority seems concerned that other precedents
    suggest that the Commerce Clause has broader application
    with respect to Indian affairs. But many of this Court’s
    precedents, even when referring to some broader power,
    Cite as: 
    599 U. S. ____
     (2023)            37
    THOMAS, J., dissenting
    dealt with laws that governed trade with Indians, no more.
    See, e.g., United States v. Holliday, 
    3 Wall. 407
     (1866) (sell-
    ing liquor to Indians); Perrin v. United States, 
    232 U. S. 478
    (1914) (same); United States v. Sandoval, 
    231 U. S. 28
    (1913) (same); Dick v. United States, 
    208 U. S. 340
     (1908)
    (selling liquor on Indian lands). Thus, even if those cases
    suggest a broader power, they must be taken in context.
    And the cases that the majority cites for its proposition turn
    out to be the ones that do so in the most obvious dicta. For
    example, Cotton Petroleum considered state taxes on Indian
    lands; it had no need to opine on the Commerce Clause be-
    yond explaining that Indian tribes are not States. See 490
    U. S., at 192. In a similar vein, Seminole Tribe of Fla. v.
    Florida, 
    517 U. S. 44
     (1996), held only that the Commerce
    Clause does not confer any authority to abrogate state sov-
    ereign immunity; any language about the breadth of the
    “Indian Commerce Clause” was wholly unnecessary to that
    result. 
    Id., at 62
    . Shorn of their dicta, all of these prece-
    dents reflect only the longstanding—and enumerated—au-
    thority to regulate commerce with Indian tribes.
    Other precedents cited by the majority that do not fit into
    Kagama’s conceptual framework are easily explicable as
    supported by other, specific powers of Congress. For exam-
    ple, Lone Wolf held that Congress can enact laws that vio-
    late treaties with Indians; that holding was justified by
    Congress’ general power to abrogate an existing law or
    treaty. 187 U. S., at 565–566; accord, La Abra Silver Min-
    ing Co., 
    175 U. S., at 460
    ; Blackstone 90. Another treaty-
    based case, Delaware Tribal Business Comm. v. Weeks, 
    430 U. S. 73
     (1977), involved the disposition of funds paid pur-
    suant to a treaty. It therefore makes sense as a matter of
    both the Property and Treaty Clauses. And yet another
    treaty-based case involved a promise by the United States
    to establish a discrete trust fund with $500,000 for a Tribe,
    with annual interest to be paid to the Tribe. See Seminole
    Nation v. United States, 
    316 U. S. 286
    , 293–294 (1942).
    38                      HAALAND v. BRACKEEN
    THOMAS, J., dissenting
    Though that case spoke of historic trust obligations, it arose
    from an explicit promise to create a trust with $500,000.16
    There is little reason to view such cases as expanding Con-
    gress’ powers.
    Accordingly, the context of all these cases points to lines
    that are at least plausibly rooted in Founding-era practices
    and the text of the Constitution. See Brown v. Davenport,
    
    596 U. S. ___
    , ___–___ (2022) (slip op., at 20–21) (judicial
    opinions must be taken in context, not read like statutes).
    Congress can regulate commerce with Indian tribes; it may
    be able to regulate tribal governments and lands in
    Kagama’s vein; and it can make treaties, dispose of federal
    funds, and establish discrete trusts.17
    ICWA does not remotely resemble those practices. It does
    not regulate commerce, tribal governments, or tribal lands.
    Nor is it based on treaties, federal funds, or any discrete
    trust. By regulating family-law matters of citizens living
    ——————
    16 Still other cases fall somewhere in the middle of these powers, but
    they are still easily explicable by normal constitutional rules. For exam-
    ple, United States v. Creek Nation, 
    295 U. S. 103
     (1935), held that the
    United States had to provide “just compensation” for the taking of Indian
    lands—which seems equally a measure of tribal lands as it does standard
    Takings Clause jurisprudence. 
    Id., at 110
    . And Sunderland v. United
    States, 
    266 U. S. 226
     (1924), involved conditions imposed on the purchase
    of land by an Indian with funds held in trust by the Federal Government;
    the funds had been acquired from the previous sale of Indian lands that
    were themselves likely held in trust. 
    Id.,
     at 231–232; see Cohen
    §16.04[3], at 1090–1091. Sunderland thus seems equally a measure of
    Indian lands and conditions on spending.
    17 Nor should we be unduly tripped up by broad language like “plenary”
    powers. Prior to our 1995 decision in United States v. Lopez, 
    514 U. S. 549
    , the Court for decades had stated that “the Commerce Clause is a
    grant of plenary authority” in the realm of interstate commerce. See Ho-
    del v. Virginia Surface Mining & Reclamation Assn., Inc., 
    452 U. S. 264
    ,
    276 (1981); Maryland v. Wirtz, 
    392 U. S. 183
    , 198 (1968); United States
    v. Darby, 
    312 U. S. 100
    , 115 (1941). Yet we then clarified that the Com-
    merce Clause’s application to interstate commerce, rather than being un-
    bounded, was limited only to economic activities. See Lopez, 
    514 U. S., at 560
    . Again, it is critical to read the Court’s precedents in their context.
    Cite as: 
    599 U. S. ____
     (2023)            39
    THOMAS, J., dissenting
    within the sole jurisdiction of States merely because they
    happen to be Indians, ICWA stands clearly outside the
    framework of our Indian-law precedents. To uphold ICWA
    therefore would drastically expand the context in which we
    have previously upheld Indian-related laws in Kagama’s
    framework.
    But, even if that is so, the majority appears to ask “why
    Congress’s power is limited to these scenarios.” Ante, at 17,
    n. 4. The majority nearly answers itself: because our Con-
    stitution is one of enumerated powers, and limiting Con-
    gress’ authority to those “buckets” would bring our jurispru-
    dence closer to the powers enumerated by the text and
    original meaning of the Constitution. See ante, at 11, 14,
    17, n. 4. While I share the majority’s frustration with peti-
    tioners’ limited engagement with the Court’s precedents, I
    would recognize the contexts of those cases and limit the so-
    called plenary power to those contexts. Such limits would
    at least start us on the road back to the Constitution’s orig-
    inal meaning in the area of Indian law.
    *     *    *
    The Constitution confers enumerated powers on the Fed-
    eral Government. Not one of them supports ICWA. Nor
    does precedent. To the contrary, this Court has never up-
    held a federal statute that regulates the noncommercial ac-
    tivities of a U. S. citizen residing on lands under the sole
    jurisdiction of States merely because he happens to be an
    Indian. But that is exactly what ICWA does: It regulates
    child custody proceedings, brought in state courts, for those
    who need never have set foot on Indian lands. It is not
    about tribal lands or tribal governments, commerce, trea-
    ties, or federal property. It therefore fails equally under the
    Court’s precedents as it fails under the plain text and orig-
    inal meaning of the Constitution.
    If there is one saving grace to today’s decision, it is that
    40                HAALAND v. BRACKEEN
    THOMAS, J., dissenting
    the majority holds only that Texas has failed to demon-
    strate that ICWA is unconstitutional. See ante, at 15, 17.
    It declines to disturb the Fifth Circuit’s conclusion that
    ICWA is consistent with Article I, but without deciding that
    ICWA is, in fact, consistent with Article I. But, given
    ICWA’s patent intrusion into the normal domain of state
    government and clear departure from the Federal Govern-
    ment’s enumerated powers, I would hold that Congress
    lacked any authority to enact ICWA.
    I respectfully dissent.
    Cite as: 
    599 U. S. ____
     (2023)            1
    ALITO, J., dissenting
    SUPREME COURT OF THE UNITED STATES
    _________________
    Nos. 21–376, 21–377, 21–378 and 21–380
    _________________
    DEB HAALAND, SECRETARY OF THE INTERIOR,
    ET AL., PETITIONERS
    21–376                 v.
    CHAD EVERET BRACKEEN, ET AL.
    CHEROKEE NATION, ET AL., PETITIONERS
    21–377              v.
    CHAD EVERET BRACKEEN, ET AL.
    TEXAS, PETITIONER
    21–378                 v.
    DEB HAALAND, SECRETARY OF THE
    INTERIOR, ET AL.
    CHAD EVERET BRACKEEN, ET AL., PETITIONERS
    21–380               v.
    DEB HAALAND, SECRETARY OF THE
    INTERIOR, ET AL.
    ON WRITS OF CERTIORARI TO THE UNITED STATES COURT OF
    APPEALS FOR THE FIFTH CIRCUIT
    [June 15, 2023]
    JUSTICE ALITO, dissenting.
    The first line in the Court’s opinion identifies what is
    most important about these cases: they are “about children
    who are among the most vulnerable.” Ante, at 1. But after
    that opening nod, the Court loses sight of this overriding
    concern and decides one question after another in a way
    that disserves the rights and interests of these children and
    2                  HAALAND v. BRACKEEN
    ALITO, J., dissenting
    their parents, as well as our Constitution’s division of fed-
    eral and state authority.
    Decisions about child custody, foster care, and adoption
    are core state functions. The paramount concern in these
    cases has long been the “best interests” of the children in-
    volved. See, e.g., 3 T. Zeller, Family Law and Practice
    §§32.06, 32.08 (2022); 6 id., §64.06. But in many cases, pro-
    visions of the Indian Child Welfare Act (ICWA) compel ac-
    tions that conflict with this fundamental state policy, sub-
    ordinating what family-court judges—and often biological
    parents—determine to be in the best interest of a child to
    what Congress believed is in the best interest of a tribe.
    The cases involved in this litigation illustrate the dis-
    tressing consequences. To its credit, the Court acknowl-
    edges what happened to these children, but its decision does
    nothing to prevent the repetition of similar events. Take
    A. L. M. His adoption by a loving non-Indian couple, with
    whom he had lived for over a year and had developed a
    strong emotional bond, was initially blocked even though it
    was supported by both of his biological parents, his grand-
    mother, and the testimony of both his court-appointed
    guardian and a psychological expert. Because a Tribe ob-
    jected, he would have been sent to an Indian couple that he
    did not know in another State had the non-Indian couple
    not sought and obtained an emergency judicial order.
    Baby O.’s story is similar. A non-Indian couple welcomed
    Baby O. into their home when she was three days old and
    cared for her for more than two years while seeking to adopt
    her. The couple ensured that Baby O.’s serious medical
    needs were met and maintained regular visits with Baby
    O.’s biological mother so that Baby O. could have a contin-
    uing relationship with her biological family. Even though
    both biological parents supported the couple’s adoption of
    Baby O., a Tribe objected and sought to send Baby O. to live
    in foster care on a reservation in another State. Only after
    Cite as: 
    599 U. S. ____
     (2023)              3
    ALITO, J., dissenting
    the couple joined this lawsuit did the Tribe agree to a set-
    tlement that would permit the couple to finalize the adop-
    tion.
    After nearly two years moving between foster-care place-
    ments, Child P., whose maternal grandmother is a member
    of an Indian Tribe, was placed with a non-Indian couple
    who provided her a stable home. After the placement, the
    Tribe, which had told the state court years earlier that
    Child P. was not eligible for tribal membership, reversed its
    position without explanation and enrolled her as a member.
    The Tribe then objected to the couple’s efforts to adopt Child
    P., even though her court-appointed guardian believed that
    the adoption was in Child P.’s best interest. “To comply
    with the ICWA,” the state court removed Child P. from the
    couple’s custody and placed her with her maternal grand-
    mother, “who had lost her foster license due to a criminal
    conviction.” Ante, at 8 (majority opinion).
    Does the Constitution give Congress the authority to
    bring about such results? I would hold that it does not.
    Whatever authority Congress possesses in the area of In-
    dian affairs, it does not have the power to sacrifice the best
    interests of vulnerable children to promote the interests of
    tribes in maintaining membership. Nor does Congress have
    the power to force state judges to disserve the best interests
    of children or the power to delegate to tribes the authority
    to force those judges to abide by the tribes’ priorities regard-
    ing adoption and foster-care placement.
    I
    The Court makes a valiant effort to bring coherence to
    what has been said in past cases about Congress’s power in
    this area, but its attempt falls short. At the end of a lengthy
    discussion, the majority distills only this nugget: Congress’s
    power over Indian affairs is “plenary” but not “absolute.”
    Ante, at 13–14. The majority in today’s cases did not coin
    this formulation; it merely repeats what earlier cases have
    4                  HAALAND v. BRACKEEN
    ALITO, J., dissenting
    said. See, e.g., Delaware Tribal Business Comm. v. Weeks,
    
    430 U. S. 73
    , 84 (1977) (quoting United States v. Alcea Band
    of Tillamooks, 
    329 U. S. 40
    , 54 (1946) (plurality opinion)).
    But the formulation’s pedigree cannot make up for its vacu-
    ity. The term “plenary” is defined in one dictionary after
    another as “absolute.” See, e.g., New Oxford American Dic-
    tionary 1343 (3d ed. 2010); Webster’s Third New Interna-
    tional Dictionary 1739 (2002); The Random House Diction-
    ary of the English Language 1486 (2d ed. 1987). If we
    accept these definitions, what the Court says is that abso-
    lute ≠ absolute and plenary ≠ plenary, violating one of the
    most basic laws of logic. Surely we can do better than that.
    We need not map the outer bounds of Congress’s Indian
    affairs authority to hold that the challenged provisions of
    ICWA lie outside it. We need only acknowledge that even
    so-called plenary powers cannot override foundational con-
    stitutional constraints. By attempting to control state judi-
    cial proceedings in a field long-recognized to be the virtually
    exclusive province of the States, ICWA violates the funda-
    mental structure of our constitutional order.
    In reaching this conclusion, I do not question the propo-
    sition that Congress has broad power to regulate Indian af-
    fairs. We have “consistently described” Congress’s “powers
    to legislate in respect to Indian tribes” as “ ‘plenary and ex-
    clusive.’ ” United States v. Lara, 
    541 U. S. 193
    , 200 (2004)
    (collecting cases). Reflecting this understanding, we have
    sanctioned a wide range of enactments that bear on Indian
    tribes and their members, sometimes (regrettably) without
    tracing the source of Congress’s authority to a particular
    enumerated power. See, e.g., Santa Clara Pueblo v. Mar-
    tinez, 
    436 U. S. 49
    , 56–58 (1978) (modifying tribal govern-
    ments’ powers of self-government); Lone Wolf v. Hitchcock,
    
    187 U. S. 553
    , 565–566 (1903) (transferring tribal land).
    Nor do I dispute the notion that Congress has undertaken
    responsibilities that have been roughly analogized to those
    Cite as: 
    599 U. S. ____
     (2023)                   5
    ALITO, J., dissenting
    of a trustee. In exercising its constitutionally-granted pow-
    ers, the Federal Government, “following ‘a humane and self
    imposed policy,’ ” has committed itself to “ ‘moral obligations
    of the highest responsibility and trust’ ” to the Indian peo-
    ple. United States v. Jicarilla Apache Nation, 
    564 U. S. 162
    , 176 (2011).1
    Nevertheless, we have repeatedly cautioned that Con-
    gress’s Indian affairs power is not unbounded. And while
    we have articulated few limits, we have acknowledged what
    should be one obvious constraint: Congress’s authority to
    regulate Indian affairs is limited by other “pertinent consti-
    tutional restrictions” that circumscribe the legislative
    power. United States v. Creek Nation, 
    295 U. S. 103
    , 109–
    110 (1935); see also New York v. United States, 
    505 U. S. 144
    , 156 (1992) (“Congress exercises its conferred powers
    subject to the limitations contained in the Constitution”).
    For example, in Seminole Tribe of Fla. v. Florida, 
    517 U. S. 44
     (1996), we held that Congress’s power under the
    Indian Commerce Clause was limited by “the background
    principle of state sovereign immunity embodied in the Elev-
    enth Amendment.” 
    Id., at 72
    . We rejected the Tribe’s ar-
    gument that Congress’s Indian affairs power could exceed
    other constitutional restrictions when “necessary” to “ ‘pro-
    tect the tribes’ ” from state interference. 
    Id., at 60
    . Foun-
    dational constitutional principles like state sovereign im-
    munity, we observed, are “not so ephemeral as to dissipate
    when the subject of the suit is [in] an area, like the regula-
    tion of Indian commerce, that is under the exclusive control
    ——————
    1 The state of affairs on many Indian reservations, however, does not
    speak well of the way in which these duties have been discharged by this
    putative trustee. See, e.g., U. S. Commission on Civil Rights, Broken
    Promises: Continuing Federal Funding Shortfall for Native Americans
    102–107, 135–138, 156–157, 165–166 (Dec. 2018) (discussing poor per-
    formance of students in tribal schools, substandard housing and physical
    infrastructure on reservations, and high rates of unemployment among
    Indians living on reservations).
    6                  HAALAND v. BRACKEEN
    ALITO, J., dissenting
    of the Federal Government.” 
    Id., at 72
    . Even when we have
    sustained legislation, we have cautioned against congres-
    sional overreach. See Lara, 
    541 U. S., at
    203–205. We have
    suggested that a law may exceed Congress’s power to regu-
    late Indian affairs if it has “an unusual legislative objec-
    tive,” brings about “radical changes in tribal status,” or “in-
    terfere[s] with the power or authority of any State.” 
    Ibid.
    We have rarely had occasion to enforce these limits, in
    part because the enactments before us have often fallen
    comfortably within the historical bounds of Congress’s enu-
    merated powers. See ante, at 33–38 (THOMAS, J., dissent-
    ing). But that does not mean that we should shy away from
    enforcement when presented with a statute that exceeds
    what the Constitution allows.
    II
    Congress’s power in the area of Indian affairs cannot ex-
    ceed the limits imposed by the “system of dual sovereignty
    between the States and the Federal Government” estab-
    lished by the Constitution. Gregory v. Ashcroft, 
    501 U. S. 452
    , 457 (1991). “The powers delegated . . . to the federal
    government are few and defined,” while “[t]hose which . . .
    remain in the State governments are numerous and indefi-
    nite.” The Federalist No. 45, p. 292 (C. Rossiter ed. 1961)
    (J. Madison). The powers retained by the States constitute
    “ ‘a residuary and inviolable sovereignty,’ ” secure against
    federal intrusion. Printz v. United States, 
    521 U. S. 898
    ,
    919 (1997) (quoting The Federalist No. 39, at 245 (J. Madi-
    son)). This structural principle, reinforced in the Tenth
    Amendment, “confirms that the power of the Federal Gov-
    ernment is subject to limits that may, in a given instance,
    reserve power to the States.” New York, 
    505 U. S., at 157
    .
    The corollary is also true: in some circumstances, the pow-
    ers reserved to the States inform the scope of Congress’s
    power. Murphy v. National Collegiate Athletic Assn., 
    584 U. S. ___
    , ___ (2018) (slip op., at 15). This includes in the
    Cite as: 
    599 U. S. ____
     (2023)             7
    ALITO, J., dissenting
    area of Indian affairs. Dick v. United States, 
    208 U. S. 340
    ,
    353 (1908) (Congress’s primacy over Indian tribes and
    States’ “full and complete jurisdiction over all persons and
    things within [their] limits” are “fundamental principles . . .
    of equal dignity, and neither must be so enforced as to nul-
    lify or substantially impair the other”).
    While we have never comprehensively enumerated the
    States’ reserved powers, we have long recognized that gov-
    ernance of family relations—including marriage relation-
    ships and child custody—is among them. It is not merely
    that these matters “have traditionally been governed by
    state law” or that the responsibility over them “remains pri-
    marily with the States,” ante, at 14 (majority opinion), but
    that the field of domestic relations “has long been regarded
    as a virtually exclusive province of the States,” Sosna v.
    Iowa, 
    419 U. S. 393
    , 404 (1975) (emphasis added). “The
    whole subject of the domestic relations of husband and wife,
    parent and child, belongs to the laws of the States, and not
    to the laws of the United States.” In re Burrus, 
    136 U. S. 586
    , 593–594 (1890). “Cases decided by this Court over a
    period of more than a century bear witness to this historical
    fact.” Sosna, 
    419 U. S., at 404
    . See, e.g., United States v.
    Windsor, 
    570 U. S. 744
    , 766 (2013); McCarty v. McCarty,
    
    453 U. S. 210
    , 220 (1981); Simms v. Simms, 
    175 U. S. 162
    ,
    167 (1899); Pennoyer v. Neff, 
    95 U. S. 714
    , 722, 734–735
    (1878).
    This does not mean that federal law may never touch on
    family matters. As the majority observes, ante, at 14, we
    have held that federal legislation that regulates certain
    “economic aspects of domestic relations” can preempt con-
    flicting state law. Ridgway v. Ridgway, 
    454 U. S. 46
    , 55–
    56 (1981) (providing an order of precedence for beneficiaries
    of a service member’s life insurance policy); see, e.g., Hill-
    man v. Maretta, 
    569 U. S. 483
    , 485–486 (2013) (allocating
    federal death benefits); McCarty, 
    453 U. S., at 211
    , 235–236
    (allocating military retirement pay). But we have never
    8                  HAALAND v. BRACKEEN
    ALITO, J., dissenting
    held that Congress under any of its enumerated powers
    may regulate the very nature of those relations or dictate
    their creation, dissolution, or modification. Nor could we
    and remain faithful to our founding. “No one denies that
    the States, at the time of the adoption of the Constitution,
    possessed full power over” ordinary family relations; and
    “the Constitution delegated no authority to the Government
    of the United States” in this area. Haddock v. Haddock,
    
    201 U. S. 562
    , 575 (1906). It is a “most important aspect of
    our federalism” that “the domestic relations of husband and
    wife”—and parent and child—are “matters reserved to the
    States and do not belong to the United States.” Williams v.
    North Carolina, 
    325 U. S. 226
    , 233 (1945) (internal quota-
    tion marks and citation omitted).
    As part of that reserved power, state courts have resolved
    child custody matters arising among state citizens since the
    earliest days of the Nation. See, e.g., Nickols v. Giles, 
    2 Root 461
    , 461–462 (Conn. Super. Ct. 1796) (declining to remove
    daughter from mother’s care); Wright v. Wright, 
    2 Mass. 109
    , 110–111 (1806) (awarding custody of child to mother
    following divorce); Commonwealth v. Nutt, 1 Browne 143,
    145 (Pa. Ct. Common Pleas 1810) (assigning custody of
    child to her sister). Then, as now, state courts’ overriding
    concern was the best interests of the children. See, e.g.,
    Commonwealth v. Addicks, 
    5 Binn. 520
    , 521 (Pa. 1813)
    (court’s “anxiety is principally directed” to the child’s wel-
    fare); In re Waldron, 
    13 Johns. Cas. 418
    , 421 (N. Y. Sup. Ct.
    1816) (court is “principally to be directed” by “the benefit
    and the welfare” of the child). By the mid-19th century,
    States had begun enacting statutory adoption schemes, en-
    forceable through state courts, “to provide for the welfare of
    dependent children,” starting with Massachusetts in 1851.
    S. Presser, The Historical Background of the American Law
    of Adoption, 
    11 J. Fam. L. 443
    , 453, 465 (1971) (Presser);
    1851 Mass. Acts ch. 324. Over the next 25 years, 23 other
    States followed suit. Presser 465–466, and nn. 111, 112. As
    Cite as: 
    599 U. S. ____
     (2023)            9
    ALITO, J., dissenting
    the cases before us attest, this historic tradition of state
    oversight of child custody and welfare through state judicial
    proceedings continues to the present day.
    The ICWA provisions challenged here do not simply run
    up against this traditional state authority, they run rough-
    shod over it when the State seeks to protect one of its young
    citizens who also happens to be a member of an Indian tribe
    or who is the biological child of a member and eligible for
    tribal membership, herself. 
    25 U. S. C. §1903
    (4). In those
    circumstances, ICWA requires a State to abandon the care-
    fully-considered judicial procedures and standards it has
    established to provide for a child’s welfare and instead ap-
    ply a scheme devised by Congress that focuses not solely on
    the best interest of the child, but also on “the stability and
    security of Indian tribes.” §1902. That scheme requires
    States to invite tribal authorities with no existing relation-
    ship to a child to intervene in judicial custody proceedings,
    §§1911(c), 1912(a), 1914. It requires States to replace their
    reasoned standards for termination of parental rights and
    placement in foster care with standards that favor the in-
    terests of an Indian custodian over those of the child.
    §§1912(e), (f ). It forces state courts to give Indian couples
    (even those of different tribes) priority in adoption and fos-
    ter-care placements, even over a non-Indian couple who
    would better serve a child’s emotional and other needs.
    §§1915(a), (b). And it requires state judges to subordinate
    the State’s typical custodial considerations to a tribe’s al-
    ternative preference. §1915(c).
    It is worth underscoring that ICWA’s directives apply
    even when the child is not a member of a tribe and has
    never been involved in tribal life, and even when a child’s
    biological parents object. As seen in the cases before us, the
    sad consequence is that ICWA’s provisions may delay or
    prevent a child’s adoption by a family ready to provide her
    a permanent home.
    ICWA’s mandates do not simply touch on family matters.
    10                     HAALAND v. BRACKEEN
    ALITO, J., dissenting
    They override States’ authority to determine—and imple-
    ment through their courts—the child custody and welfare
    policies they deem most appropriate for their citizens. And
    in doing so, the mandates harm vulnerable children and
    their parents. In my view, the Constitution cannot counte-
    nance this result. The guarantee of dual sovereignty em-
    bodied in the constitutional structure “is not so ephemeral
    as to dissipate” simply because Congress invoked a so-
    called plenary power. Seminole Tribe of Fla., 
    517 U. S., at 72
    . The challenged ICWA provisions effectively “nullify” a
    State’s authority to conduct state child custody proceedings
    in accordance with its own preferred family relations poli-
    cies, a prerogative that States have exercised for centuries.
    Dick, 
    208 U. S., at 353
    . Congress’s Indian affairs power,
    broad as it is, does not extend that far.2
    The indicators we previously identified also signal that
    ICWA exceeds Congress’s constitutional bounds. See Lara,
    
    541 U. S., at
    203–205. First, the law has “an unusual leg-
    islative objective.” 
    Id., at 203
    . ICWA’s attempt to control
    local judicial proceedings in a core field of state concern de-
    parts significantly from other Indian affairs legislation that
    we have sanctioned—laws that typically regulated actual
    commerce, related to tribal lands and governance, or ful-
    filled treaty obligations. See ante, at 33–38 (THOMAS, J.,
    dissenting). Second, the law brings about “radical changes
    in tribal status,” effectively granting tribes veto power over
    ——————
    2 Because ICWA’s provisions comprise a comprehensive child custody
    scheme relevant only to state court proceedings, I generally do not be-
    lieve they can be severed without engaging in “quintessentially legisla-
    tive work.” Ayotte v. Planned Parenthood of Northern New Eng., 
    546 U. S. 320
    , 329 (2006). An exception is §1911(a), which gives Indian tribes
    exclusive jurisdiction over child custody proceedings involving Indian
    children living within a reservation; that section is not implicated by my
    analysis. See also Fisher v. District Court of Sixteenth Judicial Dist. of
    Mont., 
    424 U. S. 382
    , 383, 388–389 (1976) (per curiam) (recognizing ex-
    clusive tribal court jurisdiction over adoption proceedings, where all par-
    ties are members of a tribe living on a reservation).
    Cite as: 
    599 U. S. ____
     (2023)            11
    ALITO, J., dissenting
    state judgments regarding the welfare of resident Indian
    children. Lara, 
    541 U. S., at 205
    . And third, the law “in-
    terfere[s] with the power [and] authority of [every] State”
    in the conduct of state judicial proceedings and determina-
    tion of child custody arrangements. 
    Ibid.
     That is, in fact,
    its express design. See, e.g., §§1911(c), 1912, 1915. These
    indicators confirm that ICWA surpasses even a generous
    understanding of Congress’s Indian affairs authority.
    *    *     *
    I am sympathetic to the challenges that tribes face in
    maintaining membership and preserving their cultures.
    And I do not question the idea that the best interests of chil-
    dren may in some circumstances take into account a desire
    to enable children to maintain a connection with the culture
    of their ancestors. The Constitution provides Congress
    with many means for promoting such interests. But the
    Constitution does not permit Congress to displace long-ex-
    ercised state authority over child custody proceedings to ad-
    vance those interests at the expense of vulnerable children
    and their families.
    Because I would hold that Congress lacked authority to
    enact the challenged ICWA provisions, I respectfully dis-
    sent.