Ryan v. ICE ( 2020 )


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  •           United States Court of Appeals
    For the First Circuit
    No. 19-1838
    MARIAN RYAN, in her official capacity as Middlesex County
    District Attorney, ET AL.,
    Plaintiffs, Appellees,
    v.
    U.S. IMMIGRATION AND CUSTOMS ENFORCEMENT ET AL.,
    Defendants, Appellants.
    APPEAL FROM THE UNITED STATES DISTRICT COURT
    FOR THE DISTRICT OF MASSACHUSETTS
    [Hon. Indira Talwani, U.S. District Judge]
    Before
    Torruella, Selya, and Kayatta,
    Circuit Judges.
    Francesca M. Genova, Trial Attorney, Office of Immigration
    Litigation, U.S. Department of Justice, with whom Joseph H. Hunt,
    Assistant Attorney General, Civil Division, William C. Peachey,
    Director, Office of Immigration Litigation, and Erez R. Reuveni,
    Assistant Director, were on brief, for appellants.
    Michael M. Hethmon, Christopher J. Hajec, and Ralph L. Casale
    on brief for Immigration Reform Law Institute, amicus curiae.
    David J. Zimmer, Special Assistant Attorney General of
    Massachusetts, with whom Daryl L. Wiesen, Alicia Rubio-Spring, and
    Goodwin Procter LLP were on brief, for appellees Ryan and Rollins.
    Wendy S. Wayne on brief for appellee Committee for Public
    Counsel Services.
    Oren N. Nimni, Lawyers for Civil Rights, David J. Zimmer,
    Daryl L. Wiesen, Alicia Rubio-Spring, and Goodwin Procter LLP on
    brief for appellee Chelsea Collaborative, Inc.
    Dayna J. Zolle, Elizabeth B. Wydra, Brianne J. Gorod, and
    Ashwin Phatak on brief for Constitutional Accountability Center,
    amicus curiae.
    Nikolas Bowie, Sabrineh Ardalan, Philip L. Torrey, and Norah
    Rast on brief for Nikolas Bowie and Harvard Immigration and Refugee
    Clinical Program, amici curiae.
    Ari J. Savitzky, Assistant Solicitor General of New York,
    Letitia James, Attorney General, Barbara D. Underwood, Solicitor
    General, Steven C. Wu, Deputy Solicitor General, William Tong,
    Attorney General of Connecticut, Karl A. Racine, Attorney General
    for the District of Columbia, Kwame Raoul, Attorney General of
    Illinois, Brian E. Frosh, Attorney General of Maryland, Keith
    Ellison, Attorney General of Minnesota, Gurbir S. Grewal, Attorney
    General of New Jersey, Hector Balderas, Attorney General of New
    Mexico, Ellen F. Rosenblum, Attorney General of Oregon, Josh
    Shapiro, Attorney General of Pennsylvania, Peter F. Neronha,
    Attorney General of Rhode Island, Robert W. Ferguson, Attorney
    General of Washington, Thomas J. Donovan, Jr., Attorney General of
    Vermont, and Mark R. Herring, Attorney General of Virginia, on
    brief for states of New York, Connecticut, Illinois, Maryland,
    Minnesota, New Jersey, New Mexico, Oregon, Pennsylvania, Rhode
    Island, Vermont, Virginia, and Washington and the District of
    Columbia, amici curiae.
    Douglas E. Keith, Alicia L. Bannon, and Brennan Center for
    Justice on brief for 19 Former Massachusetts Judges, amici curiae.
    Thomas J. Carey, Jr., Martin W. Healy, and Christopher N.
    Lasch on brief for Massachusetts Bar Association, Boston Bar
    Association, Massachusetts Academy of Trial Attorneys, Women's Bar
    Association of Massachusetts, and South Asian Bar Association of
    Greater Boston, amici curiae.
    Maria T. Davis, Howard M. Cooper, and Todd & Weld, LLP on
    brief for Massachusetts Association of Criminal Defense Lawyers,
    amicus curiae.
    Lauren Godles Milgroom, Joel A. Fleming, Amanda R. Crawford,
    and Block & Leviton LLP on brief for 27 Domestic and Sexual
    Violence Advocacy Organizations, amici curiae.
    September 1, 2020
    SELYA, Circuit Judge.        United States Immigration and
    Customs Enforcement (ICE) is the arm of the federal government
    charged with the apprehension and detention of noncitizens who are
    subject to removal.    Believing state courthouses to be appropriate
    locations in which to conduct civil enforcement actions, ICE
    increased its efforts to arrest allegedly removable noncitizens in
    and around state courthouses when they appeared for judicial
    proceedings.   In January of 2018, ICE issued Directive 11072.1
    (the   Directive),     formalizing      its      policy     regarding      civil
    enforcement actions in such courthouses.
    ICE's   growing   presence       in   Massachusetts   courthouses
    concerned a number of persons and organizations, including Marian
    Ryan and Rachael Rollins (the District Attorneys of Middlesex
    County and Suffolk County, respectively), the Committee for Public
    Counsel   Services    (the   main   public       defender   agency   for    the
    Commonwealth of Massachusetts), and Chelsea Collaborative, Inc. (a
    nonprofit that provides services to the immigrant community in
    Chelsea, Massachusetts).     Fearing the effects of ICE's activities
    on the proper functioning of both the state judicial system and
    access to justice in immigrant communities, they sued ICE, the
    United States Department of Homeland Security (DHS), and three DHS
    officials (collectively, the defendants), specifically challenging
    - 3 -
    the Directive and generally challenging ICE's policy of civilly
    arresting individuals attending court on official business.1
    When the plaintiffs moved for a preliminary injunction,
    they argued primarily that ICE lacked statutory authority under
    the Immigration and Nationality Act (INA), 
    8 U.S.C. §§ 1101-1537
    ,
    to conduct such arrests because the INA implicitly incorporates a
    hoary common law privilege against civil arrests for parties and
    witnesses    attending   court   proceedings.       The   district    court
    determined that the plaintiffs were likely to succeed on the merits
    of this argument and preliminarily enjoined ICE from implementing
    the Directive or otherwise civilly arresting individuals attending
    court on official business anywhere in Massachusetts.           See Ryan v.
    U.S. Immigr. & Customs Enf't, 
    382 F. Supp. 3d 142
    , 159, 161
    (D. Mass. 2019).2    On this interlocutory appeal, we have carefully
    considered    the   district   court's   rescript   and   the   compendious
    1 At present, the three individual defendants, named in their
    official capacities, are Chad Wolf, Acting Secretary of DHS;
    Matthew T. Albence, Acting Deputy Director of ICE (who, as the
    senior official currently in place, performs the duties of the
    Director); and Todd M. Lyons, ICE's Acting Boston Field Office
    Director.
    2 Throughout this litigation, the plaintiffs have described
    the individuals whom they believe ICE officers may not civilly
    arrest in and around courthouses as those attending court "on
    official business." The plaintiffs have not clearly defined the
    contours of this phrase, but they seem to mean parties, witnesses,
    and victims at a bare minimum.     Notwithstanding this potential
    lack of clarity, the district court adopted the terminology. See
    Ryan, 382 F. Supp. 3d at 146, 161. We, too, use it as a convenient
    shorthand.
    - 4 -
    briefing furnished by both the parties and an array of helpful
    amici.   We conclude that the district court abused its discretion
    in finding that the plaintiffs were likely to succeed on the merits
    of their argument that the INA implicitly incorporates a common
    law privilege against civil arrests for individuals attending
    court on official business.      Turning to the plaintiffs' backup
    argument, we likewise conclude that, on the underdeveloped record
    before us, the plaintiffs have so far failed to show that they are
    likely to succeed in arguing that ICE lacks statutory authority to
    conduct such arrests in Massachusetts because Congress has not
    clearly stated its intent to permit arrests that violate state
    law. Consequently, we vacate the preliminary injunction and remand
    for further proceedings consistent with this opinion.
    I. BACKGROUND
    We briefly rehearse the relevant facts and travel of the
    case.    For some time, ICE has conducted civil enforcement actions
    designed to take removable noncitizens into custody in courthouses
    across the country.    During the Obama administration, ICE imposed
    certain restrictions on the ability of its officers to conduct
    such actions in courthouses. In March of 2014, ICE issued guidance
    directing that "[e]nforcement actions at or near courthouses will
    only be undertaken against Priority 1 aliens."       An earlier ICE
    policy, which remained in effect, defined "Priority 1 aliens" as
    those posing a threat to national security or public safety.    The
    - 5 -
    2014    guidance    also   forbade    ICE    officers   from     arresting
    "collateral" noncitizens whom they encounter during an enforcement
    action against a Priority 1 target, such as family members or
    friends accompanying the target to a court appearance.
    ICE's enforcement priorities changed when the political
    winds shifted. Shortly after taking office, President Trump issued
    an executive order (the EO) on January 25, 2017, declaring the
    federal government's intention to "[e]nsure the faithful execution
    of the immigration laws . . . against all removable aliens." Exec.
    Order No. 13,768, 3 C.F.R., 2017 Comp., p. 268, reprinted in 
    8 U.S.C. § 1103
     app. at 647-49 (2018).        To this end, the EO expanded
    the classes of noncitizens prioritized for removal.             See 
    id. at 269
    .   A month later, the Secretary of DHS handed down a memorandum
    implementing the EO and rescinding any conflicting directives or
    guidance.      This memorandum reiterated the broader enforcement
    priorities delineated in the EO.
    Neither the EO nor the implementing memorandum directly
    addressed courthouse arrests.         It nonetheless appears that ICE
    officers began to conduct more civil arrests in and around state
    courthouses, including those in Massachusetts.           ICE attributes
    this change to a newfound unwillingness on the part of many state
    and local governments to honor civil immigration detainers, which
    ask    law   enforcement   agencies    to    hold   allegedly    removable
    noncitizens beyond their scheduled release from criminal custody
    - 6 -
    so that federal immigration officers may detain them.                  See City of
    Providence v. Barr, 
    954 F.3d 23
    , 29 (1st Cir. 2020).                         Such an
    unwillingness was antithetic to ICE's claim that courthouses were
    the safest place to arrest such noncitizens because courthouse
    visitors are customarily screened for weapons upon their arrival.
    In Massachusetts, the situation took on a new dimension when the
    Massachusetts Supreme Judicial Court (SJC) held that state-court
    functionaries could not detain noncitizens based solely on civil
    immigration detainers.       See Lunn v. Commonwealth, 
    78 N.E.3d 1143
    ,
    1146 (Mass. 2017) (per curiam).
    The Chief Justice of the Massachusetts Trial Court, in
    response to Lunn and ICE's more pervasive presence in Massachusetts
    courthouses,     promulgated      a    policy    for     state-court    personnel
    regarding     civil    immigration       enforcement        actions     in     state
    courthouses.     This policy took effect in November of 2017.                  Under
    it, ICE officers "may enter a courthouse and perform their official
    duties provided that their conduct in no way disrupts or delays
    court operations, or compromises court safety or decorum."                       The
    policy directs state-court personnel to ask any armed ICE officer
    seeking entry into a courthouse to state his law-enforcement
    purpose and to describe the enforcement action that he proposes to
    undertake.    If an ICE officer attempts to effect a civil arrest of
    a   noncitizen   who   is   not   in    the    court's    custody,     the    policy
    instructs state-court personnel neither to impede nor to assist
    - 7 -
    with the arrest. ICE officers may not conduct civil arrests either
    in nonpublic spaces within a courthouse or (absent permission in
    advance) in courtrooms.
    In January of 2018, ICE issued the Directive, codifying
    its policy anent civil enforcement actions in courthouses.                   The
    Directive enlarged the categories of noncitizens subject to civil
    arrest in courthouses beyond those specified in the agency's 2014
    guidance.    Specifically, ICE officers were authorized to target
    noncitizens "who have been ordered removed from the United States
    but have failed to depart" and those "who have re-entered the
    country   illegally    after    being   removed."     What     is    more,   the
    Directive   relaxed    the     restriction   on    arresting    "collateral"
    noncitizens present during an enforcement action:              it authorized
    ICE   officers    to   arrest    such   an   individual      under    "special
    circumstances, such as where [he or she] poses a threat to public
    safety or interferes with ICE's enforcement actions."                 Although
    the   Directive    instructed     ICE   officers    to    "generally     avoid
    enforcement actions in courthouses, or areas within courthouses
    that are dedicated to non-criminal . . . proceedings," it allowed
    such actions when "operationally necessary."3
    3 ICE's implementation of the Directive was debated
    extensively during the preliminary injunction hearing.      The
    defendants represented that ICE applies the Directive in
    conjunction with a prior policy discouraging the removal of
    victims, witnesses, and other noncitizens attempting to protect
    their noncriminal legal rights.  In line with this policy, ICE
    - 8 -
    As ICE started to conduct more civil enforcement actions
    in courthouses across Massachusetts, the plaintiffs' concerns
    mounted.   In their view, the specter of courthouse arrest deters
    noncitizens    from   appearing   in      court   (whether   as   criminal
    defendants, victims of crimes, parties to civil litigation, or
    witnesses).    This deterrent effect, they say, interferes with the
    ability of prosecutors and defense counsel to resolve criminal
    charges and the ability of noncitizens to enforce their legal
    rights in noncriminal areas ranging from domestic violence to
    employment.
    Spurred by these concerns, the plaintiffs filed suit in
    the United States District Court for the District of Massachusetts.
    At the same time, they moved for preliminary injunctive relief
    with respect to the first count of their complaint, which alleged
    that the Directive exceeds ICE's statutory authority and, thus,
    violates the Administrative Procedure Act (APA).             See 
    5 U.S.C. § 706
    (2)(C).    In support, they argued chiefly that the Directive
    exceeds ICE's statutory authority because the civil arrest power
    "generally" conducts courthouse arrests only of criminal
    defendants and not of victims, witnesses, and civil litigants.
    Ryan, 382 F. Supp. 3d at 161. The plaintiffs did not dispute this
    account of how ICE was implementing the Directive but observed
    that the Directive's language appears to authorize a broader range
    of civil arrests. At any rate, the precise manner in which ICE is
    implementing the Directive is largely irrelevant to the resolution
    of this appeal. To the extent that we rely on facts relative to
    ICE's   implementation   of  the   Directive,   those  facts   are
    uncontroverted.
    - 9 -
    in   the   INA   implicitly    incorporates   a    common   law   privilege
    protecting against the civil arrest of individuals attending court
    on official business.
    After a two-day hearing at which no witnesses were
    called, the district court granted the plaintiffs' motion.                See
    Ryan, 382 F. Supp. 3d at 161.       To begin, the court found that the
    plaintiffs had both constitutional and prudential standing to
    bring their APA challenge to the legality of the Directive.4              See
    id. at 152-55.      Next, the court found that the plaintiffs were
    likely to succeed in showing that the Directive exceeds ICE's
    statutory authority.     See id. at 155-59.       Finally, the court found
    that the remaining factors in the preliminary injunction calculus
    favored the plaintiffs.       See id. at 159-61.     Summing up, the court
    preliminarily enjoined the defendants "from implementing [the
    Directive] in Massachusetts and from civilly arresting parties,
    witnesses,    and   others    attending   Massachusetts     courthouses    on
    official business while they are going to, attending, or leaving
    the courthouse."     See id. at 161.
    4The defendants did not renew their attack on standing in
    their appellate briefing and, at oral argument, they disclaimed
    any intention of pressing this offensive.     Even so, we have an
    independent duty to ensure that constitutional standing exists
    before proceeding to the merits. See Merrimon v. Unum Life Ins.
    Co. of Am., 
    758 F.3d 46
    , 52 (1st Cir. 2014). We have reviewed the
    parties' submissions in the court below and, for substantially the
    reasons given by the district court, see Ryan, 382 F. Supp. 3d at
    152-55, we conclude that the plaintiffs have constitutional
    standing to pursue their APA claim.
    - 10 -
    This       interlocutory      appeal       followed.             We   have
    jurisdiction under 
    28 U.S.C. § 1292
    (a)(1).
    II. ANALYSIS
    We   have    erected   a    four-part      framework       for    district
    courts to use in determining whether to grant or deny a preliminary
    injunction.     Under this framework, a district court is tasked with
    considering the movant's likelihood of success on the merits;
    whether and to what extent the movant will suffer irreparable harm
    in the absence of preliminary injunctive relief; the balance of
    relative hardships, that is, the hardship to the nonmovant if
    enjoined as opposed to the hardship to the movant if no injunction
    issues;   and   the    effect,    if   any,    that    either     a    preliminary
    injunction or the absence of one will have on the public interest.
    See Corp. Techs., Inc. v. Harnett, 
    731 F.3d 6
    , 9 (1st Cir. 2013);
    Ross-Simons of Warwick, Inc. v. Baccarat, Inc., 
    102 F.3d 12
    , 15
    (1st Cir. 1996).
    The movant's likelihood of success on the merits weighs
    most heavily in the preliminary injunction calculus.                        See Ross-
    Simons, 102 F.3d at 16.       Indeed, we have described likelihood of
    success as the "sine qua non" of preliminary injunctive relief.
    New Comm Wireless Servs., Inc. v. SprintCom, Inc., 
    287 F.3d 1
    , 9
    (1st Cir. 2002).        If the movant "cannot demonstrate that he is
    likely to succeed in his quest, the remaining factors become
    matters of idle curiosity."        
    Id.
    - 11 -
    There is, of course, an important distinction between a
    decision at the preliminary injunction stage and a final decision
    on the merits.    Battles over preliminary injunctions normally are
    waged early in a case.          At such an embryonic stage in the
    litigation, an inquiring court need not conclusively determine the
    merits of the movant's claim; it is enough for the court simply to
    evaluate the likelihood vel non that the movant ultimately will
    prevail on the merits.      See Ross-Simons, 102 F.3d at 16.
    We assay a district court's decision to grant or deny a
    preliminary injunction for abuse of discretion.           See Corp. Techs.,
    731 F.3d at 10. Within this rubric, we examine answers to abstract
    legal questions de novo, findings of fact for clear error, and any
    judgment calls concerning the balancing of the four factors with
    significant deference to the district court. See id.; Ross-Simons,
    102 F.3d at 16.    A district court may be held to have abused its
    discretion by, say, making a material error of law, "ignor[ing]
    pertinent elements deserving significant weight, consider[ing]
    improper criteria, or, though assessing all appropriate and no
    inappropriate factors, plainly err[ing] in balancing them."              Ross-
    Simons, 102 F.3d at 16; see Corp. Techs., 731 F.3d at 10.
    The    parties'   briefs   leave   no   doubt    that   they    hold
    diametrically opposite positions on whether it is good public
    policy for ICE to arrest noncitizens in courthouses.                 In the
    plaintiffs' view, these arrests undermine access to justice in
    - 12 -
    immigrant communities and interfere with the timely resolution of
    criminal prosecutions.      In the defendants' view, the game is worth
    the candle:     they insist that courthouses provide a safe location
    for arresting noncitizens who pose a threat to public safety.
    It is not for us to say whether ICE's strategy is sound
    public policy or, conversely, whether that strategy is antithetic
    to sound public policy.       That question lies within the domain of
    the politically accountable branches of the federal and state
    governments.     Our task is simply to decide the pertinent legal
    issues    and   determine   whether   the   district      court   abused    its
    discretion in granting the preliminary injunction.
    A.
    Our starting point is the plaintiffs' likelihood of
    success on the merits.        In support of their assertion that they
    are likely to succeed on their APA claim, the plaintiffs renew the
    principal argument that they advanced below:              that the Directive
    and ICE's policy of civilly arresting individuals attending court
    on official business exceed ICE's statutory authority under the
    INA.   Importantly, they do not challenge the power of ICE officers
    to conduct criminal arrests in and around courthouses.                    See 
    8 U.S.C. § 1357
    (a)(4)-(5)      (permitting    ICE     officers      to    make
    warrantless arrests for certain federal crimes).                  Nor do they
    challenge ICE's authority to make civil arrests of noncitizens
    brought   to    courthouses   in   either   state    or    federal   custody.
    - 13 -
    Instead, their argument focuses exclusively on ICE's lack of any
    authority to civilly arrest individuals who travel to courthouses
    on their own to attend court on official business.     For ease in
    exposition, we henceforth refer to this type of arrest as a
    "courthouse arrest."
    The plaintiffs' argument presents a pure question of
    law, which we review de novo.     See Corp. Techs., 731 F.3d at 10.
    It is a bedrock principle that the power of an executive agency
    administering a federal statute "is 'authoritatively prescribed by
    Congress.'"   City of Providence, 954 F.3d at 31 (quoting City of
    Arlington v. FCC, 
    569 U.S. 290
    , 297 (2013)).    When an agency acts
    in a manner not authorized by statute, its action is ultra vires
    and a violation of the APA. See id.; see also 
    5 U.S.C. § 706
    (2)(C).
    So viewed, the plaintiffs' argument concerning the scope
    of ICE's civil arrest authority under the INA reduces to a question
    of statutory construction.    As with any effort to decipher the
    meaning of a federal statute, the touchstone of this inquiry is
    congressional intent.    See City of Providence, 954 F.3d at 31.
    And it is nose-on-the-face plain that "the quest to determine this
    intent must start with the text of the statute itself."    Id.
    The text of the INA confers broad authority upon ICE to
    conduct civil arrests.   Under 
    8 U.S.C. § 1226
    (a), an ICE officer
    may arrest a noncitizen pursuant to an administrative warrant and
    may detain him during the pendency of removal proceedings.       An
    - 14 -
    interlocking INA provision, 
    8 U.S.C. § 1357
    (a)(2), authorizes the
    warrantless arrest of a noncitizen if an ICE officer has reason to
    believe that the noncitizen is in the United States unlawfully and
    is likely to escape before he can obtain a warrant.       On their face,
    neither of these provisions bars ICE officers from exercising their
    civil arrest power either in courthouses or against individuals
    attending court on official business.            Nor do the plaintiffs
    identify an explicit limitation to this effect anywhere else in
    the text of the INA.
    Recognizing that the INA does not prohibit courthouse
    arrests in haec verba, the plaintiffs' primary theory invokes what
    has   been     called   the     "nonderogation   canon"   of    statutory
    construction.       Pasquantino v. United States, 
    544 U.S. 349
    , 359
    (2005).      They contend that there is a long-standing common law
    privilege against civil courthouse arrests.       Given this privilege,
    they add, we must presume that Congress intended not to permit
    courthouse arrests when it authorized civil arrests in the INA.
    To cap the matter, they submit that nothing in the text of the INA
    rebuts the presumption that Congress intended to incorporate this
    common law privilege, albeit sub silentio, into the statute.
    The nonderogation canon instructs that "[s]tatutes which
    invade the common law . . . are to be read with a presumption
    favoring      the   retention    of   long-established    and    familiar
    principles, except when a statutory purpose to the contrary is
    - 15 -
    evident."    
    Id.
     (alterations in original) (quoting United States v.
    Texas, 
    507 U.S. 529
    , 534 (1993)).                This instruction is rooted in
    the notion that when Congress legislates in an area permeated by
    such principles, it "does not write upon a clean slate."                       Texas,
    
    507 U.S. at 534
    .     Consequently, a court must assume that Congress
    is aware of such long-established and familiar principles and — in
    the absence of an evident statutory purpose to the contrary —
    intends to retain them.          See Lexmark Int'l, Inc. v. Static Control
    Components, Inc., 
    572 U.S. 118
    , 132 (2014); Samantar v. Yousuf,
    
    560 U.S. 305
    ,   320    n.13    (2010).           Properly    envisioned,      the
    nonderogation    canon      is   just     a    tool    to    assist   in   discerning
    congressional intent, which remains the lodestar of the judicial
    inquiry into statutory meaning.               See Pasquantino, 
    544 U.S. at 360
    ;
    Astoria Fed. Sav. & Loan Ass'n v. Solimino, 
    501 U.S. 104
    , 108
    (1991); cf. Scheidler v. Nat'l Org. for Women, Inc., 
    547 U.S. 9
    ,
    23 (2006) (explaining that "canons of interpretation . . . are
    tools designed to help courts better determine what Congress
    intended").
    Although we do not question the continuing vitality of
    the   nonderogation        canon,    we       are     less    sanguine     about   its
    applicability in the circumstances of this case.                      After all, the
    nonderogation canon does not give courts carte blanche to read a
    grab bag of common law rules into federal statutes simply to
    effectuate what those courts may perceive as good policy.                          See
    - 16 -
    Astoria, 
    501 U.S. at 108
    .           It follows that a court should apply
    the presumption that Congress intended to retain a common law rule
    only if that rule was "long-established and familiar" at the time
    of the statute's enactment.               Pasquantino, 
    544 U.S. at 359-60
    (quoting      Texas,   
    507 U.S. at 534
    ).        In   other   words,     the
    nonderogation canon comes into play only if the terms of a statute
    appear   to    disregard     a   common    law   rule   that   was   both     long-
    established and familiar when Congress enacted the statute.                    See
    id.; United States v. Craft, 
    535 U.S. 274
    , 288 (2002).                         This
    requirement ensures that the assumption that Congress was aware of
    a particular rule and, through its silence, intended to retain it
    is a reasonable one.         See Pasquantino, 
    544 U.S. at 359
    ; Astoria,
    
    501 U.S. at 108
    .
    Against this backdrop, we train the lens of our inquiry
    on the INA.     Congress enacted the provisions that authorize civil
    immigration arrests — 
    8 U.S.C. § 1226
    (a) and 
    8 U.S.C. § 1357
    (a)(2)
    — in 1952.      See Immigration and Nationality Act, Pub. L. No. 82-
    414, §§ 242(a), 287(a)(2), 
    66 Stat. 163
    , 208-09, 233 (1952).
    Although Congress revised the wording of these provisions in 1996,
    it did not alter the substantive authority that they conferred.
    See Illegal Immigration Reform and Immigrant Responsibility Act of
    1996, Pub. L. No. 104-208, §§ 303(a), 308(d)(4)(L)(i), 
    110 Stat. 3009
    -546, 3009-585, 3009-618.              Because the substance of these
    statutory provisions dates back to 1952, we must examine the state
    - 17 -
    of the common law as of that time to determine whether there was
    a   long-established    and    familiar      common    law    rule    relating    to
    courthouse arrests, which a court could presume Congress meant to
    incorporate into the INA.       See Pasquantino, 
    544 U.S. at 360
    .
    The plaintiffs purport to locate such a rule in the
    common law privilege against courthouse arrests for parties and
    witnesses to a civil suit.       For the most part, the origins of this
    privilege are uncontroversial.             At common law, a plaintiff in a
    civil action obtained personal jurisdiction over a defendant by
    means of a writ of capias ad respondendum.                  See Murphy Bros. v.
    Michetti Pipe Stringing, Inc., 
    526 U.S. 344
    , 350 (1999).                     This
    writ "directed the sheriff to secure the defendant's appearance by
    taking him into custody."            
    Id.
        The common law also recognized
    other types of arrests in civil suits.                 The writ of capias ad
    satisfaciendum, for example, was a method of executing on a civil
    judgment that directed the arrest of the judgment debtor.                        See
    Magniac v. Thomson, 56 U.S. (15 How.) 281, 300 (1853).
    English courts in the eighteenth and early nineteenth
    centuries protected parties and witnesses attending court from at
    least some of these forms of civil arrest.                  See, e.g., Ex parte
    Byne,   (1813)   35   Eng.    Rep.    123,     123,   126    (Ch.);   Walpole     v.
    Alexander, (1782) 99 Eng. Rep. 530, 531 (K.B.).                 This protection
    — which the plaintiffs refer to as a "privilege" — was designed
    both to remove a disincentive for inhibiting parties and witnesses
    - 18 -
    from coming forward (especially the risk of arrest in connection
    with another matter) and to ensure that arrests did not disrupt
    the orderly operation of the courts.         See Orchard's Case, (1828)
    38 Eng. Rep. 987, 987 (Ch.); Walpole, 99 Eng. Rep. at 531.               To
    effectuate these dual purposes, the protection extended not only
    to residents of England but also to foreigners entering the country
    for the purpose of attending court.         See Walpole, 99 Eng. Rep. at
    531.
    The protective carapace sheltered such individuals while
    they were physically present in the courthouse and while traveling
    to and from court.      See Spence v. Stuart, (1802) 102 Eng. Rep.
    530, 531 (K.B.); Meekins v. Smith, (1791) 126 Eng. Rep. 363, 363
    (C.P.); Walpole, 99 Eng. Rep. at 531.         And it applied regardless
    of whether the individual attended court voluntarily or under
    subpoena.     See   Meekins,   126   Eng.   Rep.   at   363.   As   William
    Blackstone — "whose works constituted the preeminent authority on
    English law for the founding generation," Alden v. Maine, 
    527 U.S. 706
    , 715 (1999) — summarized in his Commentaries on the Laws of
    England,
    Suitors,   witnesses,    and  other    persons,
    necessarily attending any courts of record
    upon business, are not to be arrested during
    their actual attendance, which includes their
    necessary coming and returning. And no arrest
    can be made in the king's presence, nor within
    the verge of his royal palace, nor in any place
    where the king's justices are actually
    sitting.
    - 19 -
    3 William Blackstone, Commentaries *289 (emphasis in original).
    This privilege survived an ocean crossing.       "[A]rrests
    in civil suits were still common in America" at the time of the
    founding, Long v. Ansell, 
    293 U.S. 76
    , 83 (1934), and there is no
    legitimate doubt that courts in the newly independent United States
    engrafted this privilege against courthouse arrests onto American
    common law.   In 1804, for instance, Justice Washington, riding
    circuit in Pennsylvania, invoked the privilege to authorize the
    release of a New York resident arrested on a writ of capias ad
    satisfaciendum while in the state to testify at trial. See Hurst's
    Case, 4 U.S. (4 Dall.) 387, 387-89, 
    12 F. Cas. 1019
    , 1019-20
    (C.C.D. Pa. 1804).   State courts in the early nineteenth century
    widely agreed that parties and witnesses attending court were not
    subject to arrest in civil suits.       See, e.g., Norris v. Beach, 
    2 Johns. 294
    , 294 (N.Y. Sup. Ct. 1807) (per curiam); Fletcher v.
    Baxter, 
    2 Aik. 224
    , 228-29 (Vt. 1827); Richards v. Goodson, 
    4 Va. (2 Va. Cas.) 381
    , 381-82 (Gen. Ct. 1823); cf. In re M'Neil, 
    3 Mass. (2 Tyng) 288
    , 288 (1807) (recognizing privilege but not specifying
    nature of arrest).   Questions concerning the privilege often arose
    in cases involving parties and witnesses crossing state lines to
    attend court, but the scope of the privilege was not expressly
    limited to nonresidents. See, e.g., Hurst's Case, 4 U.S. (4 Dall.)
    at 387-89, 12 F. Cas. at 1019-20; Norris, 
    2 Johns. at 294
    ; cf.
    - 20 -
    Thompson's    Case,    
    122 Mass. 428
    ,     429   (1877)   (explaining     that
    privilege against arrest applied to parties and witnesses "whether
    they are residents of this state or come from abroad").
    The practice of arresting parties as a means of securing
    personal jurisdiction in civil suits appears to have persisted to
    some degree into the late nineteenth and early twentieth centuries,
    and courts in such cases continued to recognize the vitality of
    the common law privilege against courthouse arrests.                  See, e.g.,
    Larned v. Griffin, 
    12 F. 590
    , 590 (C.C.D. Mass. 1882); Dickinson
    v. Farwell, 
    51 A. 624
    , 625 (N.H. 1902); Ellis v. De Garmo, 
    24 A. 579
    , 579-80 (R.I. 1892); see also Monroe v. St. Clair Cir. Judge,
    
    84 N.W. 305
    , 306 (Mich. 1900) (confirming existence of privilege
    but declining to discharge arrestee based on circumstances of
    arrest).      Over    time,   though,    personal      service   of   a   summons
    generally supplanted the writ of capias ad respondendum as the
    method for securing personal jurisdiction over a defendant in a
    civil action, see Murphy Bros., 
    526 U.S. at 350
    , and arrests in
    civil suits fell largely out of fashion.
    As this shift took place, some courts determined, early
    on, that the privilege against arrest pursuant to a writ of capias
    ad respondendum should not extend to service of a summons.                    See
    Christian v. Williams, 
    35 Mo. App. 297
    , 303 (Ct. App. 1889)
    (collecting cases); see also Blight v. Fisher, 
    3 F. Cas. 704
    , 704-
    05   (C.C.D.N.J.     1809)    (holding   that    privilege     of   parties   and
    - 21 -
    witnesses "extend[ed] only to an exemption from arrest," not
    service of summons).       But this view did not prevail:           recognizing
    that the threat of service of a summons still risked chilling court
    attendance, the majority of courts eventually ruled that a similar
    privilege against service of a summons should extend to at least
    some parties and witnesses.        See Stewart v. Ramsay, 
    242 U.S. 128
    ,
    129-31 (1916) (collecting cases).           Courts usually framed this
    privilege     as    protecting    nonresidents    who   had    to     enter    a
    jurisdiction to attend court proceedings.           See, e.g., Diamond v.
    Earle, 
    105 N.E. 363
    , 363 (Mass. 1914); Richardson v. Smith, 
    65 A. 162
    , 163 (N.J. 1906); Parker v. Marco, 
    32 N.E. 989
    , 989 (N.Y.
    1893).   The Supreme Court adopted such a framing of the privilege
    as a matter of federal common law in 1916, holding that "suitors,
    as well as witnesses, coming from another State or jurisdiction,
    are exempt from the service of civil process while in attendance
    upon court, and during a reasonable time in coming and going."
    Stewart, 
    242 U.S. at 129
    ; see Page Co. v. Macdonald, 
    261 U.S. 446
    ,
    448 (1923).        Nevertheless, the Court restated the rule twice in
    the   early    1930s    without   explicitly     limiting     its    scope    to
    nonresidents.       See Long, 
    293 U.S. at 83
    ; Lamb v. Schmitt, 
    285 U.S. 222
    , 225 (1932).
    Relying on this history, the defendants argue that the
    common law privilege against courthouse arrests in civil suits
    evolved well before 1952 into a privilege against personal service
    - 22 -
    of a summons — a privilege that they say was available only to
    nonresidents entering a jurisdiction for the purpose of attending
    court. We should not presume that Congress intended to incorporate
    the common law privilege against courthouse arrests into the INA,
    their thesis runs, because the privilege (at least insofar as it
    applied to arrests) was a dead letter when Congress passed the
    statute.      The   plaintiffs    rejoin    that    the   privilege   against
    courthouse arrests expanded to safeguard against service of a
    summons but did not die off in its original form.
    The short of it is that the parties draw radically
    different   conclusions    from    essentially      the   same   nucleus   of
    historical facts.       Although the defendants' argument about the
    evolution of the common law privilege seems plausible, we need not
    make a definitive ruling in this regard because there is a clearer
    path leading to the conclusion that the plaintiffs have failed to
    demonstrate    a    likelihood   of   success      with   respect   to   their
    nonderogation theory.5       Even if (as the plaintiffs posit) the
    privilege against courthouse arrests retained some vitality in
    1952, the plaintiffs' reliance on the nonderogation canon is
    5 For the same reason, we have no need to explore the
    defendants' related argument that the privilege as it applied to
    service of process narrowed significantly after the Supreme Court
    held in International Shoe Co. v. Washington, 
    326 U.S. 310
    , 316
    (1945), that due process permits the exercise of personal
    jurisdiction over certain parties who reside outside of the
    territorial boundaries of the state.
    - 23 -
    misplaced.     They have not demonstrated that there was a long-
    established and familiar common law rule protecting against civil
    arrests on behalf of the sovereign.        Put another way, we cannot
    presume that Congress intended to incorporate the privilege into
    the INA because the plaintiffs have not shown that it was clear in
    1952 that the privilege had any application to the type of arrest
    authorized by the INA.    We explain briefly.
    To recapitulate, the nonderogation canon only informs
    the construction of a federal statute when a relevant common law
    rule was long-established and familiar at the time of the statute's
    enactment.     See Pasquantino, 
    544 U.S. at 359-60
    ; Texas, 
    507 U.S. at 534
    .      The contours of the relevant common law rule are of
    decretory significance.    See Pasquantino, 
    544 U.S. at 362
    .    Those
    contours must be delineated clearly and precisely.        See 
    id. at 360, 362
    .
    Pasquantino illustrates the point.    There, the Supreme
    Court addressed whether a scheme to defraud a foreign nation of
    tax revenue came within the ambit of the federal wire fraud
    statute.     See 
    id. at 352-53
    .    The petitioners contended that the
    Court should refrain from construing the statute in this manner in
    order to avoid derogating from the common law revenue rule, which
    prohibited the collection of a foreign tax liability.      See 
    id. at 359, 361
    .    The Court rejected this contention, holding that "[t]he
    wire fraud statute derogates from no well-established revenue rule
    - 24 -
    principle."       
    Id. at 360
    .       In this wise, the Court explained that
    no case decided before the statute's enactment "held or clearly
    implied that the revenue rule barred the United States from
    prosecuting a fraudulent scheme to evade foreign taxes" and that
    its purposes did not "plainly suggest that it swept so broadly."
    
    Id.
        Along the way, the Court declined the plaintiffs' invitation
    to    analogize    the    type     of   prosecution    under   consideration     to
    factually distinct circumstances in which the revenue rule had
    been applied, such as civil suits indirectly seeking to enforce a
    foreign tax obligation.           See 
    id. at 362-68
    .
    Pasquantino teaches that the party seeking to read a
    common law rule into the statute can only do so if the factual
    circumstances are closely analogous to a case of which Congress
    would have been aware.           See 
    id. at 364-65
     (explaining that absence
    of such a case prevented Court from "say[ing] with any reasonable
    certainty whether Congress in 1952 would have considered this
    prosecution within the revenue rule").                   In other words, the
    proponent    of    the    rule     cannot   rely   exclusively      on    attenuated
    analogies and speculative inferences to show that the rule was
    long-established         and    familiar    at   the   time    of   the    statute's
    enactment.    See 
    id.
              While the nonderogation canon allows certain
    commonsense and obvious comparisons, see Bank of Am. Corp. v. City
    of Miami, 
    137 S. Ct. 1296
    , 1305 (2017) (reading proximate cause
    requirement into cause of action for damages under Fair Housing
    - 25 -
    Act, which is "akin" to tort claim), we only read a common law
    rule into the statute if it generally qualifies as long-established
    and familiar and if it is widely regarded as applicable to the
    specific subject matter covered by the statute.
    In the case at hand, the plaintiffs have failed to
    demonstrate that they are likely to succeed in showing that the
    common law privilege against courthouse arrests clearly applied to
    civil immigration arrests.      First and foremost, the plaintiffs
    have not offered any pre-1952 case law from an American court that
    directly addresses the applicability of the privilege either to
    civil immigration arrests or to fairly comparable forms of civil
    arrest, that is, civil arrests on behalf of a sovereign.         Nor (to
    the extent that they might be probative of how Congress would have
    viewed the common law in 1952) do we find direct guidance on this
    score in the English sources proffered by the parties.                 None
    expressly states whether the privilege protected against arrests
    in some or all crown-initiated civil suits.           The same lack of
    clarity is characteristic of the literature:          the plaintiffs do
    not identify a single treatise or article directly stating that
    the common law privilege extended to civil arrests on behalf of
    the sovereign.
    What skimpy authority there is tends to suggest that
    crown-initiated   suits   may   well   have   been   exempted   from    the
    operation of the privileges against arrest in court under English
    - 26 -
    common law. For example, cases and treatises indicate that certain
    litigation-related privileges protecting attorneys on account of
    their necessary attendance in court did not apply in the context
    of such suits.      See, e.g., Wheely v. Richam, (1734) 92 Eng. Rep.
    882, 882 (K.B.); 1 William Tidd, The Practice of the Court of
    King's Bench in Personal Actions 264, 268 (William P. Farrand 1807)
    (1804).    At the end of the day, these authorities may strengthen
    the defendants' hand — the two sets of privileges are intimately
    related,   as    both   of   them   developed    in   order   to   ensure    that
    necessary persons attended court proceedings, see 6 Matthew Bacon,
    A New Abridgement of the Law 530 (7th ed. 1832) (explaining that
    "[t]he law not only allows privileges to the officers of the court,
    but also protects all those whose attendance is necessary in
    courts," including parties to a civil suit) — but they are not
    dispositive      because     they   concern     the   privilege    enjoyed    by
    attorneys, not the privilege at issue here.
    For their part, the plaintiffs — like Rumpelstiltskin —
    try to convert dross into gold.           They strive to persuade us to
    treat the fact that various English treatises did not mention an
    exception for crown-initiated civil suits to the privilege for
    parties and witnesses, see, e.g., Tidd, supra, at 174-75, as
    conclusive evidence that no such exception existed.                 We are not
    convinced:      the absence of any mention of arrests on behalf of the
    sovereign, when coupled with the utter dearth of any case law
    - 27 -
    holding such arrests to be within the ambit of the privilege,
    undercuts the claim that such an application of the privilege
    should be regarded as long-established and familiar.6
    Where does this leave us? The absence of clear precedent
    involving          fairly   comparable     forms    of   civil   arrest      throws
    considerable shade on the plaintiffs' effort to show that, in 1952,
    there       was     a   long-established    and    familiar   common   law    rule
    privileging individuals attending court on official business from
    civil immigration arrests, but it does not drive a final nail into
    the coffin of their nonderogation theory. It remains a possibility
    that we might be able to presume that Congress meant to incorporate
    such a common law privilege into the INA if the case law as of
    1952 "clearly implied" that the privilege would extend to such
    arrests.      Pasquantino, 
    544 U.S. at 360
    .          On further perscrutation,
    though, this possibility dissipates:               our canvass of the case law
    discloses nothing resembling a clear implication to this effect.
    The centerpiece of the plaintiffs' forecast that the
    common law privilege would have applied to civil immigration
    6
    For similar reasons, we do not find dispositive that
    Blackstone's treatise described the common law privilege in a
    chapter on initiating process for suits involving "private
    wrongs," a category that apparently included certain "injuries
    proceeding from, or affecting, the crown." 3 William Blackstone,
    Commentaries *254, *289. Notably, Blackstone's description of the
    attorney privileges appears on the same page, but he did not
    mention the well-settled exception for crown-initiated civil suits
    applicable to those privileges. See id. at *289.
    - 28 -
    arrests is their claim that, historically, the privilege protected
    against any and all forms of civil arrest.               This claim, if
    supportable, would take them a long way toward their goal, given
    that immigration arrests are undeniably civil in nature.             See,
    e.g., United States v. Encarnacion, 
    239 F.3d 395
    , 400 (1st Cir.
    2001) (referring to "civil deportation arrests and detentions
    under 
    8 U.S.C. § 1357
    (a)(2)").     Such arrests aim to facilitate the
    removal of noncitizens from the country, see United States v.
    Vasquez-Benitez, 
    919 F.3d 546
    , 553 (D.C. Cir. 2019); cf. Demore v.
    Kim, 
    538 U.S. 510
    , 528 (2003) (explaining that detention during
    removal   proceedings   of   noncitizens   who   have   certain   criminal
    convictions "increas[es] the chance that, if ordered removed,
    [they] will be successfully removed"), which is a civil — not
    criminal — sanction, see Padilla v. Kentucky, 
    559 U.S. 356
    , 365
    (2010); Harisiades v. Shaughnessy, 
    342 U.S. 580
    , 594 (1952).          So,
    too, courts discussing the scope of the common law privilege
    sometimes used language suggesting that the privilege had broad
    application to many types of civil arrests.        See, e.g., Underwood
    v. Fosha, 
    85 P. 564
    , 565 (Kan. 1906) (describing privilege for
    parties and witnesses "from civil arrest"); Fisher v. Bouchelle,
    
    61 S.E.2d 305
    , 306 (W. Va. 1950) (referring to "long existing rule
    . . . that courts will not permit their proceedings to be disturbed
    by the arrest in a civil case" of parties and witnesses).
    - 29 -
    Digging deeper, though, discloses that the plaintiffs'
    claim is insupportable. The authorities that the plaintiffs muster
    in their attempt to demonstrate a well-established and familiar
    common    law   rule   mostly   involved   civil   arrests   in   private
    litigation, and the exceptions, though silent on the nature of the
    underlying lawsuits, offer no reason to think that they arose out
    of actions brought on behalf of a sovereign.       The plaintiffs track
    the origins of the privilege to cases involving arrests on common
    law writs in suits between private parties.        See, e.g., Norris, 
    2 Johns. at 294
    ; Fletcher, 2 Aik. at 224-25, 228-29; Richards, 4 Va.
    (2 Va. Cas.) at 381-82; Walpole, 99 Eng. Rep. at 530-31; Ex parte
    Byne, 35 Eng. Rep. at 124.       Similarly, cases that recognized the
    continuing vitality of the privilege in the late nineteenth and
    early twentieth centuries almost always involved the arrest of a
    party to a private civil suit.       See, e.g., Larned, 12 F. at 590;
    Monroe, 84 N.W. at 306; Dickinson, 
    51 A. at 625
    ; Ellis, 
    24 A. at 579-80
    .   As far we can tell, none involved an arrest on behalf of
    a sovereign.
    Because the entirety of the pre-1952 case law pertaining
    to the common law privilege appears to have involved private civil
    suits, we think that any language in the case law suggesting a
    broader rule that the privilege applied to all forms of civil
    arrest can best be read as shorthand for a statement that the
    privilege applied to a wide swath of arrests in private civil
    - 30 -
    suits. Had Congress inspected the case law in 1952 with any degree
    of care, we are confident that it would have concluded — as we do
    — that there was no clear historical precedent for extending the
    privilege to arrests on behalf of the sovereign.   Thus, we reject
    the plaintiffs' assertion that Congress would have reflexively
    inferred that the privilege protected against any and all forms of
    civil arrest, including the civil immigration arrests that it was
    authorizing in the INA.
    Of course, the fact that it was well-established and
    widely understood in 1952 only that the privilege applied to
    arrests in private civil suits does not necessarily doom the
    plaintiffs' proposed application of the nonderogation theory.
    After all, Congress might have had no reason to believe that the
    common law would have treated arrests on behalf of the sovereign
    as a breed apart.   Cf. Pasquantino, 
    544 U.S. at 364
     (rejecting
    nonderogation argument when factual differences between common law
    cases and application of statute were "significant").         Here,
    however, this possibility is more theoretical than real:      it is
    luminously clear to us (and it would have been luminously clear to
    Congress in 1952) that civil immigration arrests differ from
    arrests in private civil suits in a key respect. Civil immigration
    arrests are initiated by the sovereign in order to vindicate
    uniquely sovereign interests rather than private or proprietary
    interests.     Controlling   immigration   and   the   presence   of
    - 31 -
    noncitizens   within   the   country   are   duties   and   powers   vested
    exclusively in the sovereign.          See Dep't of Homeland Sec. v.
    Thuraissigiam, 
    140 S. Ct. 1959
    , 1982 (2020) ("[T]he power to admit
    or exclude aliens is a sovereign prerogative." (quoting Landon v.
    Plasencia, 
    459 U.S. 21
    , 32 (1982))); Galvan v. Press, 
    347 U.S. 522
    , 531 (1954) ("Policies pertaining to the entry of aliens and
    their right to remain here are peculiarly concerned with the
    political conduct of government.").           It is too abecedarian a
    proposition to warrant citation of authority that a private party
    cannot   initiate   proceedings   to   remove   a   noncitizen    from   the
    country.   Nor does removal remotely resemble any type of civil
    remedy available to private litigants.
    The fact that civil immigration arrests are initiated by
    the sovereign to vindicate uniquely sovereign interests is crucial
    to our analysis.    This fact affords a powerful reason to believe
    that courts would have treated such arrests more like criminal
    arrests than like the types of civil arrest at issue in the cases
    to which plaintiffs advert.       And the plaintiffs — whose skillful
    lawyers vigorously contest every arguable point — do not dispute
    that the privilege has never been thought to protect against
    criminal arrests or other forms of criminal process.             See, e.g.,
    Ex parte Levi, 
    28 F. 651
    , 652-53 (W.D.S.C. 1886); Cooper v. United
    States, 
    48 A.2d 771
    , 773 (D.C. 1946); State v. Gillmore, 
    129 P. 1123
    , 1125 (Kan. 1913); Schwartz v. Dutro, 
    298 S.W. 769
    , 771 (Mo.
    - 32 -
    1927); see also 2 Joseph Story, Commentaries on the Constitution
    of the United States 325 (Hilliard, Gray, and Co. 1833) (explaining
    that   constitutional    privilege       of   members    of    Congress       against
    arrest, which excludes arrests for crimes, mirrors common law
    privilege against courthouse arrests for parties and witnesses).
    This is no mere happenstance:                 although criminal arrests in
    courthouses     risk   deterring   parties      and   witnesses        from    coming
    forward and also risk disrupting ongoing proceedings, courts have
    refrained from extending the privilege to criminal arrests due to
    the overriding sovereign interests in enforcing the penal laws and
    protecting the public.         See United States v. Conley, 
    80 F. Supp. 700
    ,   702-03    (D.   Mass.    1948);    cf.    Bacon,       supra,    at     532-33
    (explaining     that   related     English      common    law    privilege        for
    attorneys did not apply to "indictments, informations, or suits,
    in which the king alone is concerned" because courts should not
    protect "those who offend against the public peace of the community
    and the king's interest").
    We add, moreover, that the analogy between criminal
    arrests and civil immigration arrests is close enough to preclude
    us from saying with sufficient confidence that immigration arrests
    would have fit within the privilege from civil arrest.                        Just as
    criminal arrests implicate the uniquely sovereign interests in
    enforcing the penal laws and protecting the public, so too do civil
    immigration arrests seek to vindicate similar kinds of interests
    - 33 -
    in controlling immigration and the presence of noncitizens in the
    country.    And just as the common law privilege was not applied to
    criminal arrests because of these overriding sovereign interests,
    one would think (for the same reason) that the privilege would not
    shield civil immigration arrests.              Especially in light of this
    plausible argument for treating civil immigration arrests like
    criminal arrests vis-à-vis the privilege, there is no principled
    way to find that the case law in 1952 clearly implied that the
    privilege would have afforded a shield against civil immigration
    arrests.
    The     plaintiffs'      remaining     arguments   regarding     the
    privilege are unavailing.           They emphasize, for example, that the
    dual purposes undergirding the privilege in the context of arrests
    in private civil suits apply in much the same way to civil
    immigration arrests.         This argument has a patina of plausibility:
    ICE's policy of conducting civil courthouse arrests may inhibit
    parties and witnesses from attending court proceedings and, in the
    bargain, it may in certain circumstances disrupt orderly court
    operations.       But even though such considerations may have held
    dispositive weight when courts determined whether to privilege
    parties and witnesses from arrests in private civil suits, that
    reasoning     carries       much   less   weight    with   respect   to    civil
    immigration arrests.           As we already have made pellucid, civil
    immigration       arrests     implicate    uniquely    sovereign     interests.
    - 34 -
    Consequently, the purposes underlying the common law privilege
    comprise    too   frail   a   foundation     for   an   assumption    that   the
    privilege would have applied to civil immigration arrests.
    We find equally unconvincing the plaintiffs' attempt to
    analogize civil immigration arrests and arrests on a writ of capias
    ad respondendum.     It is true that, viewed from ten thousand feet,
    these types of arrest bear a faint resemblance:               each involves a
    government officer taking someone into custody to ensure his
    appearance at a civil proceeding.            Apart from the "civil" label,
    though, removal proceedings have little in common with a typical
    private lawsuit.     No less an authority than the Supreme Court has
    referred to removal as a "unique" civil penalty in light of its
    particularly harsh consequences and its close connection to the
    criminal process.     Padilla, 
    559 U.S. at 365-66
    .           To assume that a
    privilege that protected against civil arrests pursuant to a writ
    of capias ad respondendum would translate to immigration arrests
    because of a few superficial similarities would be to accept
    exactly the type of attenuated analogy that the Pasquantino Court
    deemed     insufficient       to   warrant     the      application    of    the
    nonderogation canon.      Simply put, the two types of arrest are not
    fair congeners.
    We summarize succinctly.         The case law is wholly devoid
    of any clear precedent on whether the common law in 1952 would
    have applied the privilege against courthouse arrests to civil
    - 35 -
    immigration arrests.        The literature is equally nebulous.                    But
    even in this shadowy corner of the law, some things are manifest.
    Although the privilege protected against arrests in private civil
    suits, it did not apply to criminal arrests — and the fact that
    civil immigration arrests aim to vindicate uniquely sovereign
    interests supplies a strong reason to think that the common law
    would have treated them like criminal arrests for purposes of this
    privilege.      The unique nature of removal further undermines any
    analogy between civil immigration arrests and arrests in private
    civil suits.        Given these disparities, we cannot say with a
    reasonable degree of assurance that, in 1952, Congress would have
    considered the civil immigration arrests authorized in the INA to
    come   within    the    scope     of   the    common       law    privilege.       See
    Pasquantino, 
    544 U.S. at 364-65
    .             We conclude, therefore, that the
    plaintiffs    are     unlikely    to   succeed       in   demonstrating      a   long-
    established     and    familiar    common      law    rule       barring   courthouse
    arrests that can be presumed to have been incorporated into the
    INA's civil arrest authority.
    B.
    This conclusion does not end our odyssey. The plaintiffs
    have a fallback position:          they offer a different reason why, in
    Massachusetts,      ICE's   implementation       of       the    Directive   and   its
    policy of conducting civil courthouse arrests exceed its statutory
    authority.      Their rationale is that even if Congress has not
    - 36 -
    incorporated the common law privilege against courthouse arrests
    into the INA's civil arrest authority, the statute still should
    not be construed to allow ICE officers to conduct civil courthouse
    arrests that transgress state law.           In support, they assert that
    the privilege against courthouse arrests for persons attending
    court on official business is firmly established in Massachusetts
    common law; that this privilege is emblematic of an exercise of
    the Commonwealth's sovereign power to operate its judiciary; and
    that the INA does not contain a clear statement of Congress's
    intent to permit civil immigration arrests that violate such a
    core state-law privilege.
    Before tackling this argument, we pause to examine the
    framework that guides our inquiry.            The plaintiffs dress their
    argument in the raiment of preemption, maintaining that the text
    of the INA fails to rebut the presumption that Congress would not
    have intended to preempt the Massachusetts common law privilege
    against    courthouse    arrests.      Federal      preemption,    though,   is
    typically a defense to an alleged violation of state law, see
    Lawless v. Steward Health Care Sys., LLC, 
    894 F.3d 9
    , 17 (1st Cir.
    2018),    and   the   plaintiffs    have   sought    preliminary   injunctive
    relief only on their APA claim, not on the ground that ICE's
    implementation of the Directive and its policy of conducting civil
    courthouse arrests violate Massachusetts law.              Refined to bare
    essence, their argument suggests that we should construe the INA
    - 37 -
    in a way that would not authorize civil arrests in a manner that
    interferes with a state's chosen method of maintaining order and
    liberty within the confines of the state's courthouses.        This
    suggestion fits more neatly under the federalism canon of statutory
    construction described in Gregory v. Ashcroft, 
    501 U.S. 452
     (1991).
    Mindful that the relevant portion of the plaintiffs' brief relies
    heavily on Gregory, we examine their argument through that lens.7
    The federalism canon of statutory construction flows
    from the elementary principle that "the States retain substantial
    sovereign powers under our [federal] constitutional scheme."    
    Id. at 461
    .    When Congress acts within the bounds of its enumerated
    powers, the Supremacy Clause permits it to "impose its will on the
    States" and to "legislate in areas traditionally regulated by the
    States."   
    Id. at 460
    .   Given the "extraordinary" nature of this
    power, we assume that "Congress does not exercise [it] lightly."
    
    Id.
       It follows that before construing a federal statute in a way
    that "would upset the usual constitutional balance of federal and
    7It is worth noting that the federalism canon of statutory
    construction and the presumption against preemption of state law
    are intimately related doctrines. Both reflect a reluctance to
    ascribe to Congress an intent to interfere with a state's exercise
    of its sovereign powers, see Raygor v. Regents of the Univ. of
    Minn., 
    534 U.S. 533
    , 543-44 (2002), and Congress must clearly state
    such an intent if the presumption created by either doctrine is to
    be rebutted, compare Wyeth v. Levine, 
    555 U.S. 555
    , 565 (2009)
    (preemption), with Gregory, 
    501 U.S. at 460-61
     (federalism canon).
    Consequently, our analysis would proceed in much the same manner
    were we to examine the plaintiffs' argument under the rubric of
    preemption.
    - 38 -
    state powers," courts must search for a clear statement indicating
    that such a result represents Congress's intent.                  
    Id. at 460-61
    ;
    see Bond v. United States, 
    572 U.S. 844
    , 858 (2014).
    The   Supreme      Court    first     described     this      canon    of
    statutory    construction       in     Gregory,    which      addressed      whether
    Missouri's constitutional mandate that state judges must retire at
    age seventy violated the federal Age Discrimination in Employment
    Act of 1967 (ADEA).      See 501 U.S. at 455.          The question before the
    Court boiled down to whether a state judge qualifies as "an
    appointee on the policymaking level" — a category of persons
    excluded from the ADEA's sweep.            Id. at 464-65, 467 (quoting 
    29 U.S.C. § 630
    (f)).       The Court recognized that a state's choice of
    qualifications    for    its    judges     "is     a   decision    of     the     most
    fundamental sort for a sovereign entity."                
    Id. at 460
    .         Because
    "[c]ongressional      interference"         with       this    type     of      state
    decisionmaking "would upset the usual constitutional balance of
    federal and state powers," the Court asked whether the ADEA
    contained a clear statement that state judges were included within
    the statute's scope. 
    Id. at 460-61, 467
    . Answering this question,
    the Court concluded that it was "at least ambiguous whether a state
    judge is an 'appointee on the policymaking level'" and, therefore,
    found that the ADEA did not contain the requisite clear statement
    indicating that Congress intended to cover state judges.                     
    Id. at 467
    .
    - 39 -
    Invoking   the   reasoning     of    Gregory,   the    plaintiffs
    contend that the INA's generic civil arrest authority does not
    authorize ICE to conduct civil courthouse arrests in Massachusetts
    because    the   statute   does   not   contain     a   clear    statement   of
    Congress's intent to interfere with Massachusetts's sovereign
    decision   to    protect   individuals    attending      court    on   official
    business from civil arrests.       The district court did not address
    this contention because it found that the plaintiffs had shown a
    likelihood of success on the merits of their nonderogation theory.
    See Ryan, 382 F. Supp. 3d at 155-59.               This gap in the record
    presents a daunting obstacle.           While we generally may affirm a
    district court's decree on any ground made manifest by the record,
    see Kando v. R.I. State Bd. of Elections, 
    880 F.3d 53
    , 58 (1st
    Cir. 2018); Mason v. Telefunken Semiconductors Am., LLC, 
    797 F.3d 33
    , 37-38 (1st Cir. 2015), this tenet does not permit us to affirm
    on grounds that are premised on factual determinations that the
    district court did not make and that the parties dispute.                After
    all, except in rare circumstances (not present here), an appellate
    court may not engage in its own factfinding where the record
    contains evidence on a particular point that could lead reasonable
    factfinders to competing conclusions.           See Candelario-Del-Moral v.
    UBS Fin. Servs. Inc. of P.R. (In re Efron), 
    746 F.3d 30
    , 38 (1st
    Cir. 2014); Dedham Water Co. v. Cumberland Farms Dairy, Inc., 
    972 F.2d 453
    , 463 (1st Cir. 1992).
    - 40 -
    This      is   such     a    case.         The       absence    of   pertinent
    factfinding by the district court, coupled with the conflicting
    data points in the record on Massachusetts's policy on courthouse
    arrests, leads inexorably to a conclusion that we cannot affirm
    the entry of the preliminary injunction based on the plaintiffs'
    clear-statement argument.
    To   be    sure,      the    plaintiffs'         argument       rests     on    an
    uncontroversial premise:             the operation of a functioning judiciary
    is unmistakably a fundamental exercise of state sovereignty.                                See
    Atl. Coast Line R.R. Co. v. Brotherhood of Locomotive Eng'rs, 
    398 U.S. 281
    , 285, 287 (1970) (explaining that states reserved power
    to   maintain       "judicial        systems      for     the       decision      of   legal
    controversies" and referring to "the fundamental constitutional
    independence of the States and their courts").                                Inasmuch as
    congressional interference with a state's ability to manage the
    core functions of its judiciary would tilt the constitutional
    balance between state and federal power, courts must be certain of
    Congress's     intent       before       interpreting         a    federal     statute       to
    authorize such interference.               Against this backdrop, we assume —
    solely   for      purposes      of    this     appeal     —       that   a   decision        by
    Massachusetts to prohibit at least some courthouse arrests would
    represent an exercise of the Commonwealth's sovereign power to
    operate its judiciary, one with which Congress would not readily
    interfere.
    - 41 -
    Here, however, the train goes off the tracks when we
    move from the theoretical state of affairs to the actual state of
    affairs.     Because the plaintiffs' argument is premised on the
    notion that construing the INA to authorize civil courthouse
    arrests would clash with a sovereign state decision, we must know
    the scope of Massachusetts's policy on courthouse arrests in order
    to evaluate the argument.        Without such knowledge, we cannot
    determine whether and to what extent the INA's civil arrest
    authority and ICE's actions pursuant to that authority may (or may
    not) interfere with Massachusetts's exercise of its sovereign
    power.     And because the parties seeking a preliminary injunction
    bear the burden of demonstrating a likelihood of success on the
    merits of their claim, see New Comm Wireless Servs., 287 F.3d at
    9, the plaintiffs bear the burden of establishing the contours of
    the relevant Massachusetts policy (which is an essential factual
    predicate to the success of their argument).           They have so far
    failed to carry this burden.
    The plaintiffs demur, contending that the Commonwealth's
    policy is embodied exclusively in the relevant Massachusetts case
    law on the common law privilege against courthouse arrests.          To
    buttress this contention, they point out that throughout the
    nineteenth century, the SJC recognized that parties and witnesses
    were     privileged   from   civil   arrests   while   attending   court
    proceedings.     See Thompson's Case, 122 Mass. at 429; May v.
    - 42 -
    Shumway, 
    82 Mass. (16 Gray) 86
    , 86-87 (1860) (per curiam); Wood v.
    Neale, 
    71 Mass. (5 Gray) 538
    , 538 (1855); In re M'Neil, 3 Mass. (2
    Tyng) at 288.   They note, as well, that the SJC referred to this
    rule again in both 1914 and 1968 (albeit in cases involving the
    related privilege protecting against service of a summons).    See
    Valley Bank & Tr. Co. v. Marrewa, 
    237 N.E.2d 677
    , 680 (Mass. 1968);
    Diamond, 105 N.E. at 363.   Although the SJC has never addressed
    whether the privilege protects against civil immigration arrests,
    Justice Cypher, in a single justice opinion, recently described
    her view "that there exists a common law privilege against civil
    arrest in Massachusetts and that the privilege, as a matter of
    State law, is broad enough to include arrests by Federal officers."
    Matter of C. Doe, No. SJ-2018-119, slip op. at 12 (Mass. Sept. 18,
    2018).   The plaintiffs urge us to take Justice Cypher's analysis
    to mean that all civil immigration arrests of noncitizens attending
    court on official business violate Massachusetts law and policy.
    But this case law on the common law privilege is far
    from the only data point in the record regarding Massachusetts's
    policy on courthouse arrests.     In November of 2017, the Chief
    Justice of the Massachusetts Trial Court promulgated a set of rules
    governing how "staff shall respond when [ICE officers] enter a
    Massachusetts courthouse with the intent of taking custody of an
    individual." These rules specify that ICE officers may not civilly
    arrest noncitizens in nonpublic areas of state courthouses or
    - 43 -
    (absent advance permission) in courtrooms.                      Withal, they recognize
    that ICE officers may otherwise conduct civil immigration arrests
    in courthouses as long as they follow certain procedures and do
    not disrupt court operations.               This arrangement, as the defendants
    emphasize,        is        seemingly       at    odds     with         the     plaintiffs'
    interpretation         of    the    Massachusetts        common    law        privilege;   it
    indicates that Massachusetts courts do not object to all civil
    immigration arrests of noncitizens attending court on official
    business.
    The bottom line is that we are confronted with an
    unsettled record concerning Massachusetts's policy on courthouse
    arrests.         Since      the    district      court   grounded        the    preliminary
    injunction solely on its determination that the plaintiffs were
    likely to succeed on their nonderogation theory — a determination
    that turned on its mistaken assessment of long-established common
    law      throughout      the      country    rather      than     the    particulars        of
    Massachusetts law or policy, see Ryan, 382 F. Supp. 3d at 155-59
    —   it    did    not   perform       any    factfinding     that        would    assist     in
    clarifying this unsettled area of the record.                       Nor did the court
    attempt     to    reconcile        the     plaintiffs'      interpretation          of     the
    Massachusetts common law privilege against courthouse arrests with
    the Trial Court's rules, thus appearing to accept as a given ICE's
    authority to arrest certain noncitizens purportedly protected by
    the privilege.
    - 44 -
    This gap in the record is material in the sense that the
    manner in which it is filled could affect the outcome of the case.
    What is more, there is no avenue (short of a remand) through which
    we can bridge it. Undertaking the missing factfinding in the first
    instance not only would usurp the district court's prerogative but
    also would exceed the limits of our appellate role.                See In re
    Efron, 746 F.3d at 38; Dedham Water Co., 
    972 F.2d at 463
    .            Such an
    act   of   judicial   hubris,   problematic     at   any   time,   would    be
    especially unwise where, as here, the record on appeal is glaringly
    underdeveloped.
    An   example   serves    to   illustrate   this   point.       The
    plaintiffs attempt to diminish the significance of the Trial
    Court's rules as evidence of Massachusetts's policy on courthouse
    arrests by arguing that a broader ban on civil immigration arrests
    in courthouses would be futile because ICE has made clear that it
    would not comply with such a ban.         Relatedly, the plaintiffs argue
    that the Trial Court enacted these rules in order to restrict the
    involvement of court staff in ICE's enforcement actions rather
    than to cooperate with ICE.         But without more information about
    both ICE's intent and the nature and purpose of the Trial Court's
    rules, we are left with a predicate that is manifestly inadequate
    for answering the factual questions that must be answered to
    resolve these arguments.
    - 45 -
    That ends this aspect of the matter. Given the unsettled
    nature of the record and the absence of pertinent factfinding by
    the district court, we cannot conclude that the plaintiffs have
    made a sufficient showing of Massachusetts's policy on courthouse
    arrests to carry their burden.    And without such a showing, we
    have no baseline from which we can assess whether the INA's civil
    arrest authority may (or may not) interfere with the state's
    sovereign power to operate its judiciary.8
    Here, moreover, a myriad of other factors beyond the
    underdeveloped record must be factored into the equation.   For one
    thing, the parties have not fully explored the ramifications of
    the Gregory-based argument in their briefing.9   For another thing,
    the argument raises complex and novel legal issues, and we do not
    have the benefit of the district court's insights on those issues.
    To add yet another complication, it is unclear whether a policy
    8 Once again, an example helps to illustrate the point. The
    defendants represented at oral argument that ICE has exercised its
    civil arrest authority in compliance with the Trial Court's rules.
    If so, and if those rules comport with Massachusetts's policy, we
    would be hard-pressed to hold that ICE's exercise of its civil
    arrest authority clashes with the Commonwealth's sovereign power
    in a way that would engender federalism concerns. Under such a
    scenario, it is questionable whether Gregory's clear-statement
    rule would be triggered at all.
    9  Although there are many such ramifications, one is
    particularly striking.   If taken to its logical end point, the
    plaintiffs' Gregory-based argument leads to a strange result:
    ICE's authority to conduct civil courthouse arrests might vary on
    a state-by-state basis, depending on each state's policy on the
    subject.
    - 46 -
    forbidding     the        arrest     of    all     individuals      attending         court
    proceedings        would    constitute       the    type    of   exercise       of    state
    sovereignty that triggers Gregory's clear-statement rule.                         See 501
    U.S.   at    460    (emphasizing         that    state   constitutional         provision
    setting qualifications for judges "is a decision of the most
    fundamental        sort     for     a     sovereign      entity");       cf.    EEOC     v.
    Massachusetts, 
    987 F.2d 64
    , 66, 69 (1st Cir. 1993) (finding Gregory
    inapplicable        in    deciding       whether    state   law    requiring         public
    employees to pass medical examination at age seventy violated
    ADEA).      It is possible that only a narrower range of courthouse
    arrests (say, those occurring in the courtroom itself) would fall
    within this taxonomy.              And this is just the tip of the iceberg:
    taken together, the uncertainties that pervade this area of the
    record counsel in favor of judicial restraint.                       See Levinsky's,
    Inc. v. Wal-Mart Stores, Inc., 
    127 F.3d 122
    , 134 (1st Cir. 1997)
    (refusing to resolve complex legal issue for first time on appeal
    in light of deficiencies in the record, absence of district court
    opinion, and lack of full briefing from parties).
    Let us be perfectly clear.               We take no view on the role,
    if   any,    that    Gregory       and    the    federalism      canon    may    play    in
    construing the scope of the INA's civil arrest authority.                            Nor do
    we make any determination about the law or policy of Massachusetts
    vis-à-vis courthouse arrests.                   With respect to this issue, we
    conclude only that, without additional factfinding, the lack of
    - 47 -
    clarity in the record about Massachusetts's policy on courthouse
    arrests prevents us from determining whether or not the plaintiffs
    are    likely    to   succeed      on   the    merits      of   their    Gregory-based
    argument.       Following remand, the district court may evaluate this
    argument, either on a renewed motion for preliminary injunction or
    on the merits, with the help of both a better-developed record and
    more exegetic briefing.            As part of its evaluation, the district
    court may consider whether, on a better-developed record, it would
    be appropriate to certify a question or questions to the SJC in
    order to pin down Massachusetts's policy on courthouse arrests.
    See    Mass.     S.J.C.     Rule    1:03;      see    also      Matter   of   C.    Doe,
    No. SJ-2018-119, slip op. at 12 n.14 (Mass. Sept. 18, 2018) ("If
    a Federal Court were at all in doubt about the continued existence
    of the privilege in Massachusetts, or its applicability in given
    circumstances, it would of course be free to certify to this court
    any questions it has about the existence and applicability of the
    privilege.").
    III. CONCLUSION
    We need go no further. For the reasons elucidated above,
    we conclude that the plaintiffs thus far have failed to show a
    likelihood of success on the merits of their nonderogation theory,
    that    is,    that   the   Directive         and    its   authorization      of   civil
    courthouse      arrests     by   the    federal       government    to    enforce    the
    immigration laws, exceed ICE's statutory authority because the INA
    - 48 -
    implicitly incorporates a common law privilege against courthouse arrests.
    The district court's contrary ruling was based on a material error of law
    and, thus, we hold that it constitutes an abuse of discretion.     See Corp.
    Techs., 731 F.3d at 10.   So, too, we hold that the plaintiffs have not to
    this point shown a likelihood of success on their APA claim based on the
    argument that, in Massachusetts, ICE's implementation of the Directive and
    its policy of conducting civil courthouse arrests exceed its statutory
    authority because Congress has not made clear its intent to permit ICE to
    conduct arrests in violation of state law.10   As a movant may not secure a
    preliminary injunction without demonstrating a likelihood of success on the
    merits, we have no need to consider the parties' arguments concerning either
    the remainder of the preliminary injunction calculus or the scope of the
    district court's injunction.   See Wine & Spirits Retailers, Inc. v. Rhode
    Island, 
    418 F.3d 36
    , 54 (1st Cir. 2005).
    We vacate the preliminary injunction and remand to the district
    court for further proceedings consistent with this opinion.      All parties
    shall bear their own costs.
    Vacated and remanded.
    10 Certain amici supporting the plaintiffs asseverate that
    ICE's policy of arresting noncitizens in courthouses is unlawful
    for a variety of other reasons.      We decline to address these
    asseverations. The customary praxis in this circuit is to eschew
    arguments raised only by amici and not by the parties. See, e.g.,
    In re Sony BMG Music Ent., 
    564 F.3d 1
    , 3 (1st Cir. 2009); Lane v.
    First Nat'l Bank of Bos., 
    871 F.2d 166
    , 175 (1st Cir. 1989). We
    see no reason to depart from this praxis today.
    - 49 -