County of Dane v. Public Service Commission of Wisconsin ( 2022 )


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    2022 WI 61
    SUPREME COURT       OF   WISCONSIN
    CASE NO.:            2021AP1321-LV & 2021AP1325
    COMPLETE TITLE:      County of Dane, County of Iowa, Town of Wyoming
    and Village of Montfort,
    Petitioners-Respondents,
    v.
    Public Service Commission of Wisconsin,
    Respondent-Respondent,
    Driftless Area Land Conservancy, Wisconsin
    Wildlife Federation, Chris Klopp, LeRoy Belken,
    Gloria Belken, S.O.U.L. of Wisconsin, Clean
    Energy Organizations, Dairyland Power
    Cooperation, I.T.C. Midwest, LLC, American
    Transmission Company, Midcontinent Independent
    System Operator, Inc. and WEC Energy Group
    Wisconsin,
    Intervenors-Respondents,
    Michael Huebsch,
    Other Party-Petitioner-Petitioner.
    County of Dane, Iowa County, Town of Wyoming
    and Village of Montfort,
    Petitioners-Respondents,
    v.
    Public Service Commission of Wisconsin,
    Respondent-Respondent-Respondent,
    Driftless Area Land Conservancy,
    Intervenor-Petitioner-Respondent,
    Wisconsin Wildlife Federation, Chris Klopp,
    LeRoy Belken, Gloria Belken, S.O.U.L.
    Wisconsin, Clean Energy Organizations,
    Dairyland Power Cooperative, ITC Midwest
    LLC, American Transmission Company, LLC,
    Midcontinent Independent System Operator,
    Inc., ATC, LLC and WEC Energy
    Group, Inc.,
    Intervenors-Respondents,
    Michael Huebsch,
    Other Party-Appellant-Petitioner,
    Robert M. Garvin,
    Other Party.
    REVIEW OF DECISION OF THE COURT OF APPEALS
    OPINION FILED:          July 7, 2022
    SUBMITTED ON BRIEFS:
    ORAL ARGUMENT:          February 28, 2022
    SOURCE OF APPEAL:
    COURT:               Circuit
    COUNTY:              Dane
    JUDGE:               Jacob B. frost
    JUSTICES:
    ROGGENSACK, J., delivered the majority opinion of the Court with
    respect to ¶4, in which ZIEGLER, C.J., REBECCA GRASSL BRADLEY,
    and HAGEDORN, JJ., joined, and an opinion, in which ZIEGLER,
    C.J., REBECCA GRASSL BRADLEY, JJ., joined. HAGEDORN, J., filed
    a concurring opinion. KAROFSKY, J., filed a dissenting opinion,
    in which ANN WALSH BRADLEY and DALLET, JJ., joined.
    NOT PARTICIPATING:
    ATTORNEYS:
    For the other party-petitioner-petitioner in 2021AP1321-LV
    and other party-appellant-petitioner in 2021AP1325, there were
    briefs by Ryan J. Walsh, John K. Adams, John D. Tripoli and
    Eimer Stahl LLP, Madison. There was an oral argument by Ryan J.
    Walsh.
    For the intervenor-respondent Clean Energy Organizations,
    there was a brief filed by Amelia Vohs, Sean Brady, Kevin M. St.
    John, John N. Giftos, Roisin H. Bell and Minnesota Center for
    Environmental Advocacy, Saint Paul, Clean Grid Alliance, Saint
    Paul, and Bell Giftos St. John LLC, Madison. There was an oral
    argument by Barret Van Sicklen.
    For    the       petitioners-respondents             County   of     Dane,     Iowa
    County,      Town      of    Wyoming    and    Village     of   Montfort,    intervenor
    respondent in 2021AP1321-LV and intervenor-petitioner-respondent
    in   2021AP1325,            Driftless   Area       Land   Conservancy,    and   for   the
    2
    intervenors-respondents, Wisconsin Wildlife Federation, S.O.U.L.
    of Wisconsin, Gloria Belken, and Chris Klopp, there was a brief
    filed    by    Catherine         E.    White,    Howard         A.    Learner,       Bradley    D.
    Klein,    Ann       Jaworski          and    Hurley       Burish      S.C.,    Madison,        and
    Environmental Law & Policy Center, Chicago. For the intervenors-
    respondents, there was an oral argument by Barret Van Sicklen.
    For intervenor-respondent, Midcontinent Independent System
    Operator, there was a brief filed by Jeffrey L. Small, Warren J.
    Day, Amanda James and Midcontinent Independent System Operator,
    Inc., Carmel, Law Office of Warren J. Day, Oregon, and Sullivan
    & Ward, P.C., West Des Moines. There was an oral argument by
    Barret Van Sicklen.
    For         intervenors-respondents,                     American          Transmmission
    Company, Dairlyand Power Cooperative, and ITC Midwest, there was
    a brief filed by Brian H. Potts, Valerie T. Herring, Justin W.
    Chasco,       and   Perkins           Coie    LLP,    Madison,         Taft    Stettinius        &
    Hollister,      Minneapolis,            and    Wheeler,         Van   Sickle     &    Anderson,
    S.C., Madison. There was an oral argument by Barret Van Sicklen.
    For       the    respondent-respondent                 in    2021AP1321-LV         and     the
    respondent-respondent-respondent                     in    2021AP1325,         there     was     a
    brief filed by Cynthia E. Smith, Zachary Peters, Christiane A.R.
    Whiting   and       Public       Service      Commission         of   Wisconsin,       Madison.
    There was an oral argument by Christiane A.R. Whiting.
    An amicus curiae brief was filed by Evan Feinauer and Katie
    Nekola for Clean Wisconsin, Inc.
    An amicus curiae brief was filed by Matthew M. Fernholz and
    Cramer,       Multhauf       &     Hammes,       LLP,       Waukesha,         for     Wisconsin
    Manufacturers and Commerce.
    3
    An amicus curiae brief was filed by             Benjamin B. Sloan,
    Matthew M. Fernholz, and Organization of MISO States, Madison,
    and Cramer, Multhauf & Hammes, LLP, Waukesha, for Organization
    of MISO States, Inc.
    An amicus curiae brief was filed by Robert S. Driscoll and
    Reinhart Boerner Van Deuren S.C., Milwaukee, for American Clean
    Power Association.
    An amicus curiae brief was filed by Scott E. Rosenow and
    WMC Litigation Center, Madison, for Wisconsin Manufacturers and
    Commerce,      Inc.,   Wisconsin    Utilities    Association,      Inc.,    and
    Edison Electric Institute.
    An amicus curiae brief was filed by James Bradford Ramsay,
    Lane    E.B.    Ruhland,   and     National   Association     of   Regulatory
    Utility   Commissioners,     Washington,      D.C.,   and   Ruhland   Law   and
    Strategy,      Waunakee,   for     National   Association     of   Regulatory
    Utility Commissioners.
    4
    
    2022 WI 61
    NOTICE
    This opinion is subject to further
    editing and modification.   The final
    version will appear in the bound
    volume of the official reports.
    Nos.   2021AP1321-LV & 2021AP1325
    (L.C. No.   2019CV3418)
    STATE OF WISCONSIN                      :            IN SUPREME COURT
    County of Dane, County of Iowa, Town of Wyoming
    and Village of Montfort,
    Petitioners-Respondents,
    v.
    Public Service Commission of Wisconsin,
    Respondent-Respondent,
    FILED
    Driftless Area Land Conservancy, Wisconsin
    Wildlife Federation, Chris Klopp, LeRoy Belken,            JUL 7, 2022
    Gloria Belken, S.O.U.L. of Wisconsin, Clean
    Energy Organizations, Dairyland Power                        Sheila T. Reiff
    Cooperation, I.T.C. Midwest, LLC, American                Clerk of Supreme Court
    Transmission Company, Midcontinent Independent
    System Operator, Inc. and WEC Energy Group
    Wisconsin,
    Intervenors-Respondents,
    Michael Huebsch,
    Other Party-Petitioner-Petitioner.
    County of Dane, Iowa County, Town of Wyoming
    and Village of Montfort,
    Petitioners-Respondents,
    v.
    Public Service Commission of Wisconsin,
    Respondent-Respondent-Respondent,
    Driftless Area Land Conservancy,
    Intervenor-Petitioner-Respondent,
    Wisconsin Wildlife Federation, Chris Klopp,
    LeRoy Belken, Gloria Belken, S.O.U.L.
    Wisconsin, Clean Energy Organizations,
    Dairyland Power Cooperative, ITC Midwest LLC,
    American Transmission Company, LLC,
    Midcontinent Independent System Operator, Inc.,
    ATC, LLC and WEC Energy Group, Inc.,
    Intervenors-Respondents,
    Michael Huebsch,
    Other Party-Appellant-Petitioner,
    Robert M. Garvin,
    Other Party.
    ROGGENSACK, J., delivered the majority opinion of the Court with
    respect to ¶4, in which ZIEGLER, C.J., REBECCA GRASSL BRADLEY,
    and HAGEDORN, JJ., joined, and an opinion, in which ZIEGLER,
    C.J., REBECCA GRASSL BRADLEY, JJ., joined. HAGEDORN, J., filed
    a concurring opinion. KAROFSKY, J., filed a dissenting opinion,
    in which ANN WALSH BRADLEY and DALLET, JJ., joined.
    APPEAL from an order of the Circuit Court for Dane County.
    Reversed.
    ¶1     PATIENCE DRAKE ROGGENSACK, J.   Dane County filed this
    Wis. Stat. ch. 227 (2019-20)1 action in Dane County Circuit Court
    1 All subsequent references to the Wisconsin Statutes are to
    the 2019-20 version unless otherwise indicated.
    2
    Nos.    2021AP1321-LV & 2021AP1325
    to contest the merits of the Public Service Commission's (PSC)2
    approval     of    the     Cardinal-Hickory               Creek     Transmission         Line.
    Driftless        Area     Land      Conservancy            and      other        Intervenors-
    Respondents       (hereinafter       Driftless)           intervened3       in    the   action
    that remains pending in Dane County Circuit Court.                                Therefore,
    the merits of the PSC's approval of Cardinal-Hickory are not
    addressed in this opinion.
    ¶2     We   conclude       that     in   pretrial          decisions       the    circuit
    court     erroneously      interpreted             
    Wis. Stat. § 227.57
    (1),        which
    interpretation formed the basis for its expansion of the record
    created by the PSC and permitted discovery subpoenas of Michael
    Huebsch.     We so conclude because Driftless failed, as a matter
    of   law,   to    satisfy      the   statutory            criteria,      or      due    process
    requirements, necessary to expand the record created by the PSC
    during the Cardinal-Hickory proceedings.
    ¶3     In    regard      to    the       discovery          subpoenas       issued    to
    Huebsch, we conclude that the circuit court erred when it denied
    Huebsch's     motion      to     quash.            The    circuit     court's      error    is
    grounded     in     its     erroneous          interpretation           of       
    Wis. Stat. § 227.57
    (1) wherein it approved discovery subpoenas.
    ¶4     Although four justices do not agree on how to address
    the procedural posture of this case, a majority of the court
    2The PSC is a three-member Commission, which was composed
    of Rebecca Valcq, Ellen Nowak and Michael Huebsch when the
    Cardinal-Hickory line was approved.
    3The Intervener-Respondents aligned with Driftless are the
    Wisconsin Wildlife Federation, S.O.U.L. of Wisconsin, LeRoy
    Belken, Gloria Belken and Chris Klopp.
    3
    Nos.    2021AP1321-LV & 2021AP1325
    agrees that the circuit court improperly denied Huebsch's motion
    to    quash    the    discovery        subpoena       he      received.      Driftless'
    allegations of bias do not come close to the level of alleging a
    cognizable due process claim under Caperton v. A.T. Massey Coal
    Co., Inc., 
    556 U.S. 868
    , 884 (2009) and Miller v. Carroll, 
    2020 WI 56
    , ¶24, 
    392 Wis. 2d 49
    , 
    944 N.W.2d 542
    .
    ¶5      We further conclude that the circuit court did not
    clearly apply the correct legal standard when evaluating whether
    a due process violation had been stated; we reverse the circuit
    court's July 30, 2021 order denying Huebsch's motion to quash
    discovery       subpoenas;       and     we        conclude      the   circuit    court
    erroneously denied Huebsch's request for a stay pending appeal.
    Accordingly, we reverse the circuit court.
    I.     BACKGROUND
    ¶6      This    lawsuit,    filed       by    Dane     County,   challenges    the
    PSC's approval of construction of the Cardinal-Hickory line.4                         As
    the    lawsuit       moved   forward      and        added     intervening     parties,
    Driftless sought to expand the record produced before the PSC
    pursuant to 
    Wis. Stat. § 227.57
    (1) in order to produce grounds
    to overturn the merits of the Cardinal-Hickory decision.
    ¶7      The record of the proceedings reflects that Cardinal-
    Hickory       enjoyed    widespread        support         from    labor,     industry,
    business groups, environmentalists, Republicans and Democrats.
    4The Cardinal-Hickory docket opened in April 2018 when
    American Transmission Company LLC, ITC Midwest LLC and Dairyland
    Power Cooperative petitioned the PSC for a certificate of public
    convenience and necessity (CPCN) for construction and operation
    of the transmission line.
    4
    Nos.    2021AP1321-LV & 2021AP1325
    Its proponents provided testimony that Cardinal-Hickory would
    improve      energy         reliability          and          create      clean-energy
    infrastructure      for      Wisconsin     by     enabling        greater      usage    of
    renewable    energy    sources      across      the    Midwest.5        More     than   60
    persons participated as parties in the proceedings, including
    Driftless.
    ¶8      The     chairman       of    the      Federal        Energy     Regulatory
    Commission (FERC) made strengthening interstate transmission a
    principal goal, which he presented to the PSC.6                          The PSC held
    highly    technical        fact-based      hearings,          supported     by    expert
    testimony, during June of 2019.
    ¶9      On August 20, 2019 in an open meeting, the PSC voted
    unanimously to grant the Certificate of Public Convenience and
    Necessity    (CPCN)        for   construction         of     Cardinal-Hickory.          On
    September 26, 2019, the PSC issued a 112 page written order
    finalizing CPCN approval.
    ¶10     After     it    lost   before       the    PSC,     Driftless      moved    to
    disqualify    two     of     the   three       commissioners,          alleging    their
    participation created an unconstitutional "appearance of bias
    and lack of impartiality."7             It alleged that Chairperson Rebecca
    5  Clean Grid Alliance, Fresh Energy, and Minnesota Center
    for Environmental Advocacy's Request to Intervene and Notice of
    Appearance,   PSC   REF#   353628  at   3   (Nov.  20,   2018),
    https://tinyurl.com/hc4xvy68.
    6  Energy Policy Institute, Revitalizing the Grid to Achieve
    a Clean-Powered Economy: A Conversation with FERC Chair Richard
    Glick (June 30, 2021) https://tinyurl.com/f2znuja8.
    7    PSC Order, September 26, 2019, 80.
    5
    Nos.    2021AP1321-LV & 2021AP1325
    Valcq's past work for We Energies "created an appearance of
    bias"       and    Michael       Huebsch's        work   with     a    federal         regulator,
    Midcontinent Independent System Operator (MISO), precluded his
    participation             because        he     could     have        received         ex     parte
    communications            about        Cardinal-Hickory      while       at       MISO      events,
    again raising the "appearance of bias."
    ¶11        In    its     written       decision    approving         construction        of
    Cardinal-Hickory, the PSC unanimously rejected Driftless' bias
    claims because they were "not timely filed and did not comply
    with       applicable          legal    standards."8        The       PSC     explained        that
    Huebsch was a PSC "Commissioner at the time of [Driftless']
    intervention and it was publicly known that Commissioner Huebsch
    was the Commission's OMS representative," as was his work with
    MISO, which had been on-going for more than four years.9                                    The PSC
    explained that "[i]t is clear that the information [Driftless]
    cited to support its Motion was available to it months (if not
    years) before the party hearing and the Commission's discussion
    of the record at the open meeting of August 20, 2019."10
    ¶12        The    PSC    noted     that     Driftless      did       not    support     its
    allegations             with     a     verified       affidavit       based       on     personal
    knowledge of the facts alleged in its motion, nor did it name a
    single witness who would have such knowledge.11                             Accordingly, the
    
    Id., 81
    ; see also Driftless Area Land Conservancy v. Valcq
    8
    (Driftless II), 
    16 F.4th 508
    , 517 (7th Cir. 2021).
    9    PSC Order, September 26, 2019, 81.
    10   
    Id., 82
    .
    11   
    Id., 83
    .
    6
    Nos.     2021AP1321-LV & 2021AP1325
    PSC found that Driftless' motion "lacks a legitimate factual
    basis     to    support         recusal      or      disqualification."12                   The    order
    further        explained,        "There         is       a    presumption          of    honesty     and
    integrity            in     those         serving            as        adjudicators       in      state
    administrative proceedings."13                       The PSC found that Valcq's and
    Huebsch's "participation complied with all applicable ethical
    and legal standards and [Driftless'] Motion lack[ed] any merit
    and [was] therefore denied."14                               Driftless did not appeal the
    factual findings or legal conclusions of the PSC decision.
    ¶13        Wisconsin        Stat.       § 227.57             challenges        to   PSC      action
    usually are limited to contending that the evidence did not
    support        the    merits      of      the     PSC's           decision.         However,      here,
    Driftless            mounted         a     sustained              personal         attack       against
    Commissioner          Huebsch        in    an    effort           to      expand   the    PSC     record
    through        the        use   of       § 227.57(1).                  In    general     statements,
    Driftless contended that at some point Huebsch could have done
    something that might appear to show bias in favor of Cardinal-
    Hickory, which Driftless asserts would violate the Due Process
    Clause     of    the        Fourteenth          Amendment           and      require     vacation    of
    approval of Cardinal-Hickory.15
    12   Id., 84.
    13Id., 85 (citing State ex rel. DeLuca v. Common Council,
    
    72 Wis. 2d 672
    , 684, 
    242 N.W.2d 689
     (1976)).
    14   Id., 86.
    15Driftless dropped its initial contention that Valcq's
    past work created "the appearance of bias" and proceeded solely
    against Huebsch.
    7
    Nos.   2021AP1321-LV & 2021AP1325
    ¶14        The circuit court concluded that Driftless' general
    statements         "presented     enough       information        to     allow    discovery
    regarding          whether    Commissioner         Huebsch       acted       impartially."16
    Driftless then subpoenaed Huebsch to sit for a deposition.                                  It
    also    subpoenaed       his    phone    and       phone   password       for    Driftless'
    search of his communications.                  Huebsch moved to protect himself
    from Driftless' subpoenas.
    ¶15        Before the Dane County Circuit Court, where its 
    Wis. Stat. § 227.57
             action    is    pending,          Driftless         mounted     a
    directionless search for "appearance of bias."17                                The circuit
    court       has    permitted     Driftless         to   expand    the     record    of     the
    Cardinal-Hickory proceedings by concluding that an allegation of
    the "appearance of bias," if proved, was a due process violation
    sufficient to invalidate the PSC's decision.                           It also concluded
    that general "allegations" were all that were needed to satisfy
    § 227.57(1).18          Many     depositions        were   taken       and    thousands    of
    pages of documents were produced.
    ¶16        Huebsch moved to quash the subpoenas in circuit court.
    The circuit court refused protection, saying that the difference
    between "serious risk of actual bias" and "appearance of bias"
    was just "semantics."19               While acknowledging our recent decision
    16   Circuit Ct. Decision and Order, May 25, 2021, 1.
    There were occasions when Driftless also used the phrase
    17
    "serious risk of actual bias"; however, as the circuit court
    repeated later, "appearance of bias" was the common phraseology.
    18   Circuit Ct. Decision and Order, May 25, 2021, 3.
    19   Circuit Ct. Mot. Hr'g Tr., July 30, 2021, 15.                         On August
    8
    Nos.   2021AP1321-LV & 2021AP1325
    in Miller v. Carroll20 that employs serious risk of actual bias
    as the due process standard, the circuit court re-characterized
    the standard as the "'appearance' [of bias standard] because
    that really is what it is."21
    ¶17    Huebsch moved the court of appeals for interlocutory
    review      and   stay    of   the    discovery         subpoenas.      The   court   of
    appeals granted interlocutory review and stayed the subpoenas
    while the court studied the legal issues presented.                           Driftless
    then withdrew its subpoenas and moved the court of appeals to
    dismiss, claiming the action was moot.                     Based on the withdrawal
    of the subpoenas, the court of appeals vacated its stay and the
    interlocutory review it had granted, concluding that the issue
    for which it had granted review was moot.22
    ¶18    Then, two business days after the court of appeals
    determined        that     the       appeal       was    moot     and    vacated      its
    interlocutory review, Driftless subpoenaed Huebsch to testify at
    trial.       Although Huebsch did not move the circuit court to quash
    the    subpoena     for    trial       testimony,        he    sought    an   emergency
    20, 2021, at Driftless' request, the circuit court vacated its
    order denying Huebsch's motion to quash: "IT IS HEREBY ORDERED
    that the order denying Michael Huebsch's motion to quash issued
    on August 3, 2021, Dkt. 422, and the August 5, 2021 order on
    phone protocol, Dkt. 432, are hereby VACATED."
    20   Miller v. Carroll, 
    2020 WI 56
    , 
    392 Wis. 2d 49
    , 
    944 N.W.2d 542
    .
    21   Id., 16.
    County of Dane v. PSC of Wis., No. 2021AP1321-LV,
    22
    unpublished order at 5 (Wis. Ct. App. Aug. 20, 2021).
    9
    Nos.      2021AP1321-LV & 2021AP1325
    petition for supreme court review and stay of the proceedings in
    circuit court.          We granted review and stayed further action in
    the circuit court, which included Huebsch's trial testimony.
    II.    DISCUSSION
    A.   Standard of Review
    ¶19    When the discovery subpoenas directed to Huebsch were
    withdrawn     by    Driftless,       the    court   of      appeals    dismissed     this
    matter as moot.         County of Dane v. PSC of Wis., No. 2021AP1321-
    LV, unpublished order at 5 (Wis. Ct. App. Aug. 20, 2021).                               We
    independently review whether an issue is moot as a question of
    law.    Tavern League of Wis., Inc. v. Palm, 
    2021 WI 33
    , ¶13, 
    396 Wis. 2d 434
    , 
    957 N.W.2d 261
     (citing Portage Cnty. v. J.W.K.,
    
    2019 WI 54
    , ¶10, 
    386 Wis. 2d 672
    , 
    927 N.W.2d 509
    ).
    ¶20    This matter arises in the context of a 
    Wis. Stat. § 227.57
     judicial review of the merits of the PSC's approval of
    Cardinal-Hickory.         Generally, such reviews are confined to the
    record that was created before the agency.                        However, Driftless
    seeks to expand the record that was presented to the PSC during
    the    Cardinal-Hickory         proceedings.           It      does   so    pursuant   to
    § 227.57(1) that permits record expansion due to "irregularities
    in procedure before the agency" . . . "if proper cause is shown
    therefor."
    ¶21    As we review the discovery subpoenas issued to Huebsch
    after   the    circuit       court     determined        that     Driftless'       general
    allegations        of   bias    were      sufficient      to    satisfy     
    Wis. Stat. § 227.57
    (1)        thereby     permitting        expansion       of   the    PSC    record
    through discovery, we also interpret § 227.57(1).                           We do so to
    10
    Nos.      2021AP1321-LV & 2021AP1325
    determine       whether     Driftless'            non-specific            allegations         come
    within    "irregularities          in    procedure"           of    the        PSC    for   which
    "proper cause is shown therefor" as those terms are used in
    § 227.57(1).         Driftless'         contention        and       the     circuit      court's
    decision     present       questions         of     statutory        interpretation           and
    application that we independently review.                             Tavern League, 
    396 Wis. 2d 434
    , ¶13.
    ¶22   In addition, Driftless claims that the irregularity in
    the procedure was Huebsch's "appearance of bias" that denied it
    due process of law.          Whether constitutional due process has been
    afforded in an administrative proceeding is a question of law
    that we independently review.                 Marder v. Bd. of Regents of the
    Univ. of Wis. Sys., 
    2005 WI 159
    , ¶19, 
    286 Wis. 2d 252
    , 
    706 N.W.2d 110
         (citing   State       v.    Sorenson,         
    2002 WI 78
    ,    ¶25,   
    254 Wis. 2d 54
    , 
    646 N.W.2d 354
    ).
    ¶23   And     finally,       we    review         whether       the      circuit      court
    erroneously exercised its discretion when it denied Huebsch's
    motion to quash the subpoenas for his deposition, his cell phone
    and cell phone password.                Lane v. Sharp Packaging Sys., Inc.,
    
    2002 WI 28
    , ¶19, 
    251 Wis. 2d 68
    , 
    640 N.W.2d 788
    .                                     Whether the
    circuit court applied the correct legal standard as it exercised
    its   discretion      is    a     question         of   law     that      we     independently
    review.     
    Id.
    B.       Mootness
    ¶24   "Mootness        is     a    doctrine         of       judicial          restraint."
    Marathon Cnty. v. D.K., 
    2020 WI 8
    , ¶19, 
    390 Wis. 2d 50
    , 
    937 N.W.2d 901
    .        "An issue is moot when its resolution will have no
    11
    Nos.    2021AP1321-LV & 2021AP1325
    practical effect on the underlying controversy."                          J.W.K., 
    386 Wis. 2d 672
    , ¶11.           Although we usually do not address issues
    that are moot, we have developed exceptions where we agree to
    review issues that may be moot when:                   "(1) 'the issues are of
    great     public     importance;'       (2) 'the      constitutionality             of    a
    statute      is   involved;'     (3) the        situation    arises     so    often      'a
    definitive decision is essential to guide the trial courts;'
    (4) 'the issue is likely to arise again and should be resolved
    by the court to avoid uncertainty;' or (5) the issue is 'capable
    and likely of repetition and yet evades review.'"                      Id., ¶12.
    ¶25    We need not decide whether issues raised herein are
    moot    because     even    if   they   were,      exceptions     to    the    mootness
    doctrine      provide      for   our    review.        For    example,        the    only
    conceivable basis for mootness here is Driftless' voluntarily
    withdrawing its July subpoenas through which it sought to expand
    the record created in the PSC proceedings.
    ¶26    An issue is likely to arise again and evade review
    when an actor voluntarily ceases challenged conduct but retains
    the power to resume that conduct.                 Friends of the Earth, Inc. v.
    Laidlaw Env't Servs., Inc., 
    528 U.S. 167
    , 189 (2000) (explaining
    that the obligation to persuade a court that the challenged
    conduct cannot reasonably be expected to start up again lies
    with the party asserting mootness).                  In the matter before us,
    not    only   did    Driftless     have    the     power     to   issue      additional
    subpoenas to Huebsch, it did so in August, a few days after the
    court of appeals vacated its stay and withdrew the interlocutory
    12
    Nos.   2021AP1321-LV & 2021AP1325
    review it had granted.           Accordingly, we choose to address the
    issues presented for our review.
    C.   Wisconsin Stat. § 227.57 Review
    1.       Statutory Interpretation
    ¶27 Dane County filed this case as a 
    Wis. Stat. § 227.57
    judicial review to test the merits of the PSC's approval of
    Cardinal-Hickory.         A    determination    on    the    merits     of   that
    decision remains pending a hearing in Dane County Circuit Court.
    The scope of the Dane County judicial review will be "confined
    to the record" unless the criteria to expand the record set out
    in § 227.57(1) are met.         Section 227.57(1) provides:
    The review shall be conducted by the court without a
    jury and shall be confined to the record, except that
    in cases of alleged irregularities in procedure before
    the agency, testimony thereon may be taken in the
    court and, if leave is granted to take such testimony,
    depositions and written interrogatories may be taken
    prior to the date set for hearing as provided in ch.
    804 if proper cause is shown therefor.
    § 227.57(1).
    ¶28   It is important to note that our review focuses on
    allegations about Huebsch, which the circuit court has concluded
    are sufficient to satisfy 
    Wis. Stat. § 227.57
    (1)'s criteria to
    expand the PSC record through discovery.               Our review does not
    address the merits of the PSC's approval of Cardinal-Hickory.23
    Rather,   we   address        Driftless'    allegation,     and   the    circuit
    23 Here, we conclude that Huebsch, as a subpoena recipient,
    can challenge whether a reasonable jurist would understand
    Driftless' allegations as raising a cognizable Caperton due
    process claim in the context of the attempt to expand the PSC
    record pursuant to 
    Wis. Stat. § 227.57
    (1).
    13
    Nos.    2021AP1321-LV & 2021AP1325
    court's conclusion, that Huebsch's "appearance of bias" was an
    irregularity in the PSC procedure during the Cardinal-Hickory
    proceeding     under   the     provisions      of      § 227.57(1).        Stated
    otherwise, Driftless contends that the circuit court's statutory
    interpretation permits Driftless to expand the record created in
    the PSC proceedings.24        Driftless asserts it can do so through
    testimony    in   court   and    by   taking        depositions    and    written
    interrogatories prior to the court hearing based on Huebsch's
    "appearance of bias" that impaired its right to due process
    during the PSC proceedings.
    ¶29   In order to assess the statutory argument Driftless
    makes, and on which the circuit court permitted discovery, we
    interpret 
    Wis. Stat. § 227.57
    (1).           We begin with the language of
    the statute.      State ex rel. Kalal v. Cir. Ct. for Dane Cnty.,
    
    2004 WI 58
    , ¶45, 
    271 Wis. 2d 633
    , 
    681 N.W.2d 110
    .                  If the words
    are    commonly    used      words    without       specific      or     technical
    definitions, we apply common definitions.                
    Id.
       If words chosen
    are technical terms or specially defined, we apply definitions
    consistent with that legislative choice.                
    Id.
        Context also is
    important to meaning, as is the structure of the statute itself.
    Id., ¶46.
    ¶30   In order to expand the record that was created before
    the PSC, a plain reading of 
    Wis. Stat. § 227.57
    (1) requires that
    Driftless argued, "Petitioners propose to identify a set
    24
    of specific, relevant documents that the parties can easily and
    quickly 'produce' again in state court.       This approach is
    [grounded] in this Court's authority under Section 227.57(1)."
    R. 297 at 4.
    14
    Nos.    2021AP1321-LV & 2021AP1325
    Driftless first show "proper cause."                        "[I]f proper cause is
    shown" of an irregularity in procedure of the PSC, § 227.57(1)
    provides that the court may grant leave to take testimony in
    court and to take depositions and written interrogatories prior
    to the date set for a hearing on the merits of the agency
    decision.         Although      "proper    cause"     is      not     defined       in   the
    statute, § 227.57(1) nevertheless requires that the moving party
    provide     evidence     of   procedural        irregularities         such       that   the
    circuit court may conclude that there is proper cause to grant
    leave to expand the PSC record.
    ¶31    In Marris v. City of Cedarburg, 
    176 Wis. 2d 14
    , 
    498 N.W.2d 842
        (1993),       we   considered            alleged        bias     of    an
    administrative      decision-maker.             We   held     that     a    prima    facie
    showing of wrongdoing by a decision-maker is necessary in order
    to evaluate a claim of bias in an administrative decision.                               
    Id. at 29-30
    .       Alleged wrongdoing must be based on factual evidence.
    
    Id.
         As we explained, a prima facie showing of wrongdoing by a
    decision-maker requires specific statements of objective facts
    that are sufficient to show bias of the decision-maker.                             
    Id. at 24
    .
    ¶32    In Marris, neighbors challenged the continued legality
    of Marris's use of one of the buildings on her property for
    which     she     had    been     granted       a    nonconforming           use.        An
    administrative hearing was held to determine whether Marris's
    repairs     of     her    property        caused     it      to     lose      its    legal
    nonconforming use.
    15
    Nos.    2021AP1321-LV & 2021AP1325
    ¶33   After a decision contrary to Marris, she challenged a
    member of the review committee, alleging bias.                 
    Id. at 23
    .     In
    our discussion, we detailed specific factual statements of the
    decision-maker that were necessary to making the prima facie
    case    of   wrongdoing.       That     is,    we     examined    whether    the
    chairperson's statements showed that he had prejudged whether
    Marris's repairs of her property were sufficient to cause loss
    of its legal nonconforming use.
    ¶34   As we explained, the chairperson's statements, which
    were part of the record of the committee's discussion, related
    to his characterization of the merits of Marris's claim.                     For
    example, "the chairperson referred to Marris's legal position as
    a 'loophole' in need of 'closing.'"            
    Id. at 27
    .        He expressed a
    desire "to 'get her [Marris] on the Leona Helmsley rule,'" 
    id.,
    and he questioned the claimant's credibility.25                  
    Id. at 27-28
    .
    We concluded that taken together his "statements overc[ame] the
    presumption of honesty and integrity that would ordinarily be
    applied."      
    Id. at 29-30
    .   We      concluded    that   his   statements
    "clearly indicated that he had prejudged Marris's case, thus
    creating an impermissibly high risk of bias" in his committee
    decision.     
    Id. at 31
    .      We then remanded the matter for a new
    hearing in which the chairperson could not participate.                
    Id.
    In analyzing expenditures, he questioned how could the
    25
    Board know "whether Marris 'bought a door for that building or
    for another building she built.'" Marris v. City of Cedarburg,
    
    176 Wis. 2d 14
    , 28, 
    498 N.W.2d 842
     (1993).
    16
    Nos.    2021AP1321-LV & 2021AP1325
    ¶35    In a similar way, the court of appeals discussed the
    requirement        that    is    necessary          in   order    to     expand    a   record
    created during common law certiorari review of an administrative
    proceeding     when       it    considered      irregularities           in    procedure    in
    Sills v. Walworth Cnty. Land Mgmt. Comm'n, 2002 WI App. 111, 
    254 Wis. 2d 538
    , 
    648 N.W.2d 878
    .                        Sills explained that when the
    allegation         is     bias     of     an      administrative            decision-maker,
    expansion of the record created by the agency requires a "prima
    facie showing of wrongdoing" by the decision-maker.                             Id., ¶42.
    ¶36    It is important to note that general allegations about
    the adjudicator that were made in Sills were in sharp contrast
    with the specific statements made by the adjudicator in Marris.
    In Sills, the objectors alleged that a lobbyist retained by
    Peterson to garner public support for the Conditional Use Permit
    (CUP) application "may have had" ex parte communications with
    the adjudicating committee "which may have led to bias in the
    proceedings."           Id., ¶34.
    ¶37    In    evaluating          whether      "help[ing]        to     gather   public
    support" for the CUP was sufficient to open discovery, the court
    of appeals noted that nothing was presented to show the lobbyist
    "directly contacted Committee members."                          Id., ¶43.        There also
    was no showing that "members were influenced by something more
    than    the    application          of      the      evidence       to      the    ordinance
    standards."         Id.        In concluding that general allegations were
    insufficient to open discovery and thereby permit expansion of
    the record, the court of appeals said:
    17
    Nos.     2021AP1321-LV & 2021AP1325
    The sole and limited purpose for the requested
    discovery     is    to     determine     whether   the
    lobbyist . . . contacted any Committee members . . . .
    This transparent attempt to use the discovery process
    as a fishing expedition to uncover evidence of bias is
    precluded by the presumption of honesty and integrity
    that we accord the Committee's decision.
    Id.
    ¶38    As Sills explained, a prima facie showing cannot rest
    solely on general allegations.                    Sills denied the attempt to
    expand    the     record    of    the     Committee      proceedings         because    "an
    allegation of ex parte contacts without more is not sufficient
    to show the impermissibly high risk of bias that concerned the
    court in Marris."          Id., ¶44.
    ¶39    We agree with the reasoning of Sills, and conclude
    that the phrase, "if proper cause is shown therefor," as it is
    employed     in    
    Wis. Stat. § 227.57
    (1),         requires       a    prima    facie
    showing of wrongdoing by an administrative decision-maker.                               We
    further      conclude      that    "proper       cause   is     shown       therefor"    by
    providing specific factual statements by the adjudicator that
    show     wrongdoing,       i.e.,     objective       factual      evidence       of     the
    adjudicator       prejudging       the    merits    of    the    matter       before    the
    committee.        Id., ¶¶42, 43.
    ¶40    General allegations that the challenger characterizes
    as implying improper acts of an administrative decision-maker
    are insufficient.           Id.     Our interpretation also is consistent
    with Marris.        There, we evaluated how to approach allegations of
    bias by a decision-maker.                We did so by reviewing the decision-
    maker's specific factual statements that bore on the merits of
    the claim before the committee.              Marris, 
    176 Wis. 2d at 24, 31
    .
    18
    Nos.    2021AP1321-LV & 2021AP1325
    ¶41    Driftless has provided no factual statements by or to
    Huebsch     on     the    merits     of    the     Cardinal-Hickory          line.26       Its
    general     allegations         of   concern        are    legally        insufficient     to
    permit expansion of the record created before the PSC pursuant
    to the requirements of 
    Wis. Stat. § 227.57
    (1).           The circuit
    court erred when it interpreted Driftless' general allegations
    as   sufficient          to   satisfy      § 227.57(1)           and    thereby    permitted
    Driftless to employ discovery subpoenas.27                              The circuit court
    ignored      the     statutory        phrase       "if     proper        cause     is   shown
    therefore" stated in § 227.57(1), giving it no meaning at all.
    Accordingly, the circuit court erred in its interpretation of
    § 227.57(1).        We now move to consider what due process requires.
    2.    Due Process
    ¶42    Due         process          applies         to       proceedings          before
    administrative entities.                  Withrow v. Larkin, 
    421 U.S. 35
    , 46
    (1975).      A basic element of due process is the right to a fair
    hearing conducted before a fair tribunal.                              Miller, 
    392 Wis. 2d 49
    , ¶24; Marder, 
    286 Wis. 2d 252
    , ¶27.
    ¶43    In order to show a due process violation, the claimant
    must show a "serious risk of actual bias."                              Caperton, 556 U.S.
    Attorney
    26         Rachael  Granneman,   counsel  for  Driftless,
    provided a "Declaration" made after her review of meeting
    minutes and other documents created by various organizations.
    She adds her opinion of what those copied documents mean. None
    of the minutes and documents attached to her Declaration are
    based on her personal knowledge of what occurred at various
    meetings.
    27   Circuit Ct. Decision and Order, May 25, 2021, 3.
    19
    Nos.   2021AP1321-LV & 2021AP1325
    at 884; Miller, 
    392 Wis. 2d 49
    , ¶24.                      The burden of making that
    proof    is     on    the   party   challenging           the     impartiality      of   the
    adjudicator.          Marder, 
    286 Wis. 2d 252
    , ¶32 (relying on Withrow,
    
    421 U.S. at 47
    ).
    ¶44     In Marder, a tenured faculty member complained that ex
    parte    contacts      with   members       of    the     Board    of    Regents    on   the
    merits of his case must have occurred because of continuing
    interactions of Board members with others.                         Marder, 
    286 Wis. 2d 252
    , ¶2.      Marder's claim of bias failed because:
    Marder has not presented any facts that would overcome
    the presumption that the chancellor and Marcovich
    acted appropriately when they traveled together. They
    were not prohibited from talking to one another and
    the legal presumption that administrative adjudicators
    are able to maintain their professional and ethical
    responsibility to remain impartial and to conduct
    themselves appropriately applies.
    Id., ¶34.
    ¶45     As we explained in Marder while relying on the United
    States    Supreme       Court's     discussion       in     Withrow,      administrative
    decision-makers are entitled to the presumption of "honesty and
    integrity" when serving as adjudicators.                        Withrow, 
    421 U.S. at 47
    .     As the concurrence carefully explained in Herrmann, "[I]t
    is not reasonable to question a judge's impartiality unless one
    can     prove    by    objective     evidence           that    actual     bias     or   the
    probability of a serious risk of actual bias exists."                              State v.
    Herrmann, 
    2015 WI 84
    , ¶113, 
    364 Wis. 2d 336
    , 
    867 N.W.2d 772
    (Ziegler,       J.,    concurring).         To     overcome        the   presumption      of
    honesty       and     integrity,      the        party     asserting       bias     of    an
    20
    Nos.    2021AP1321-LV & 2021AP1325
    administrative adjudicator must show a "serious risk of actual
    bias——based on objective and reasonable perceptions."                                   Caperton,
    
    556 U.S. at 884
    .
    ¶46     Before    us,    Driftless           makes    three           types    of   general
    allegations         on         which      it          claims             a      due        process
    violation:       (1) Huebsch's           activities            with            MISO        provided
    opportunities      for    improper        conversations;             (2) Huebsch's              life-
    time       friendships    with    those        who     work     in       the     provision        or
    distribution        of      energy        could         have         included              improper
    conversations; and (3) Huebsch's application for employment by
    Dairyland      Power     Cooperative          after    he     resigned          from       the   PSC
    implies a connection between his decision in Cardinal-Hickory
    and future employment.
    a.     MISO
    ¶47     MISO is controlled by federal law.                            A brief review of
    MISO's functions and its support by state and federal statutes
    as     a    regional     energy        regulator        will        be        helpful      to    our
    discussion.
    ¶48     More than ten years ago, Wisconsin decided to require
    certain         utilities         to       join             MISO.                
    Wis. Stat. § 196.485
    (3m)(a)1.d.; §§ 196.485(2)(a) and (4)(a).                                   MISO is the
    operator of the regional transmission system of which Wisconsin
    is a part.28      It administers a FERC-approved tariff to which MISO
    must respond.           Performing this task requires MISO to oversee
    MISO
    28         Region      Engagement       available                                         at:
    https://www.misoenergy.org/stakeholder-engagement/miso-
    engagement.
    21
    Nos.    2021AP1321-LV & 2021AP1325
    various energy-related functions for which it needs input from
    state energy regulators, such as the PSC, on matters that affect
    bulk electric power systems.                    
    18 C.F.R. § 35.34
    (k); see also
    Ill. Commerce Comm'n v. Fed. Energy Reg. Comm'n, 
    721 F.3d 764
    ,
    769-71 (7th Cir. 2013) (explaining background for MISO).
    ¶49    As   FERC     has        explained,       "We    recognize          that      state
    utility       regulators       play      an    important        and     unique        role    in
    transmission       planning         processes,      given      that     the    states       often
    have     authority       over       transmission,        permitting,           siting,       and
    construction, and that many state regulatory commissions require
    utilities to engage in integrated resource planning."29                               The FERC
    requires       "[e]ach         public         utility     transmission               provider,"
    including       the     PSC,    "[t]o         participate"         in     these      "regional
    transmission planning process[es]."30
    ¶50    To   assist      in    FERC's     informational           process,       the   PSC
    delegates authority to one of its commissioners to represent
    Wisconsin's interests at Organization of MISO States (OMS)31 and
    before MISO.          This delegation became a part of Huebsch's service
    as a commissioner on the PSC in 2015.                          Therefore, he was the
    PSC's       delegate    when      he     participated         in    the       MISO    and     OMS
    29   FERC Order No. 1000-A, 
    139 FERC ¶ 61,132
    , ¶291 (May 17,
    2012).
    Order No. 1000 Transmission Planning and Cost Allocation,
    30
    https://tinyurl.com/x8k6uve5.
    OMS is separate from MISO.
    31                                Huebsch was an OMS
    representative to the MISO Advisory Committee under the OMS
    Bylaws. See OMS, Organization of MISO States Bylaws at Articles
    V.3, X (revised Sept. 13, 2002).
    22
    Nos.      2021AP1321-LV & 2021AP1325
    activities of which Driftless complains.                  Huebsch's interactions
    in regard to MISO and OMS were publically known long before the
    proceedings on Cardinal-Hickory began.32
    ¶51    Driftless alleges that Huebsch's activities with MISO
    and   OMS    support   its    allegation     that    he    engaged   in   ex   parte
    communications         that    are    prohibited           under     
    Wis. Stat. § 227.50
    (1)(a).         Driftless    makes    this    allegation     without     one
    single example of Huebsch engaging in conversations with anyone
    from MISO or OMS about the merits of the Cardinal-Hickory line.33
    ¶52    Ex parte communication on the merits of a contested
    matter is the focus of 
    Wis. Stat. § 227.50
    (1)(a).                    It regulates
    ex parte communications on the merits as follows:
    [I]n a contested case, no ex parte communication
    relative to the merits or a threat or offer of reward
    shall be made, before a decision is rendered, to the
    hearing examiner or any other official or employee of
    the agency who is involved in the decision-making
    process, by any of the following:
    1m. An official of the agency or any other
    public employee or official engaged in prosecution or
    advocacy   in   connection   with  the   matter   under
    consideration or a factually related matter . . . .
    2. A party to the proceeding, or any person who
    directly or indirectly would have a substantial
    interest   in  the   proposed  agency action  or  an
    authorized representative or counsel.
    § 227.50(1)(a).
    32   PSC Order Sept. 26, 2019, 81.
    Huebsch did receive a communication regarding Cardinal-
    33
    Hickory, but it came from a member of another state regulatory
    commission. Huebsch publically disclosed this communication, as
    required by Wisconsin law.
    23
    Nos.      2021AP1321-LV & 2021AP1325
    ¶53     According       to     
    Wis. Stat. § 227.50
    (1)(a),            not    all
    communications        with       those     involved          in     the     decision-making
    process are prohibited.             Only those communications "relative to
    the merits" of a pending matter are proscribed.                               Driftless has
    identified no communications between Huebsch and MISO or OMS, or
    anyone    else,     relative      to     the    merits       of    the     Cardinal-Hickory
    line.       Rather,      Driftless       implies       there      must     have    been   such
    communications because of Huebsch's attendance at MISO and OMS
    events.       General      allegations          such    as     Driftless       asserts    are
    legally insufficient to contravene the terms of § 227.50(1)(a)
    because     they    do     not    show    a    communication          "relative      to    the
    merits" of the Cardinal-Hickory line.
    ¶54     In     addition,          Driftless        does        not     recognize      the
    necessary     connections         among        MISO,    OMS,        FERC     and   the    PSC.
    However, the required connections among the PSC, MISO, OMS and
    the FERC under state and federal statutes were apparent years
    before      Driftless       intervened         in      this       action.34        Huebsch's
    participation in MISO and OMS as the PSC's delegate also was
    publically available years before Driftless intervened in this
    action.35          Given    the     public          nature     of     this     information,
    Driftless' general allegations about Huebsch's participation in
    MISO and OMS activities as somehow showing an appearance of bias
    borders on frivolous pleading.
    34   Id., 82.
    35   Id., 83.
    24
    Nos.   2021AP1321-LV & 2021AP1325
    ¶55   Driftless also ignores the presumption of honesty and
    integrity    that    is   accorded           to    decisions        of    administrative
    decision-makers.     Sills, 
    254 Wis. 2d 538
    , ¶43; Withrow, 
    421 U.S. at 47
    .      In order to overcome the presumption of honesty and
    integrity, Driftless was required to prove a "serious risk of
    actual    bias——based     on    objective          and     reasonable      perceptions."
    Caperton, 
    556 U.S. at 884
    .                As we explained in Miller, "[t]o
    assess whether the probability of actual bias rises to the level
    of a due process violation, we apply, verbatim, the standard
    from Caperton.       We ask whether there is 'a serious risk of
    actual bias——based on objective and reasonable perceptions.'"
    Miller, 
    392 Wis. 2d 49
    , ¶24.
    ¶56   Before      us,         Driftless        ignores        the     foundational
    presumption of honesty and integrity of administrative decision-
    makers, and makes no showing of actual communications on the
    merits of Cardinal-Hickory that could evidence a serious risk of
    actual bias.     Driftless had the burden of proof in its challenge
    to   Huebsch's    impartiality.              Marder,        
    286 Wis. 2d 252
    ,    ¶24;
    Withrow, 
    421 U.S. at 47
    .                 Because it did not provide factual
    evidence    of   wrongdoing         by   Huebsch,         it    failed    to   meet   that
    burden.
    ¶57   In   regard        to     
    Wis. Stat. § 227.57
    (1),       by     which
    Driftless asserts its due process claim as an "irregularity in
    the procedure" before the PSC, judicial review under § 227.57(1)
    "shall be confined to the record."                    The record may be expanded
    only "if proper cause is shown" of an irregularity in procedure
    before the PSC.      Therefore, the potential to expand the record
    25
    Nos.    2021AP1321-LV & 2021AP1325
    is conditional.         We conclude that first, a prima facie showing
    that Huebsch engaged in wrongdoing must be made.                                       Sills, 
    254 Wis. 2d 538
    , ¶42.            Driftless has not identified one example of
    wrongdoing by Huebsch in regard to his interactions with MISO or
    OMS.
    ¶58   Accordingly, we conclude that Driftless' allegations
    in     regard    to    Huebsch's         activities          with        MISO    and     OMS    are
    insufficient as a matter of law to pose a serious risk of actual
    bias,    such    that   he    was    required          to    recuse       himself       from    the
    Cardinal-Hickey proceedings based on a due process violation.
    Caperton, 
    556 U.S. at 884
    ; Miller, 
    392 Wis. 2d 49
    , ¶22.                                        They
    also are insufficient to support expanding the Cardinal-Hickory
    record created in proceedings before the PSC pursuant to 
    Wis. Stat. § 227.57
    (1)      because         they     show       no     factual      evidence       of
    wrongdoing by Huebsch.
    b.    Friendships
    ¶59   Although Driftless argues to us that Huebsch's many
    friendships within the energy community could be a basis for
    bias,    this    contention      was       not     made       until       briefing       in    this
    review.      As with its allegation in regard to MISO, Driftless'
    allegations      are    general      associational             concerns          for    which    it
    provides no factual incidents of communication about the merits
    of the Cardinal-Hickory line.
    ¶60   Caperton     and Miller require that the decision-maker
    evidence     a   serious      risk       of   actual         bias     before      due     process
    requires     recusal.         Caperton,          
    556 U.S. at 884
    ;    Miller,       
    392 Wis. 2d 49
    , ¶24.             Without evidence of factual communications
    26
    Nos.    2021AP1321-LV & 2021AP1325
    that show wrongdoing by Huebsch, "proper cause" to expand the
    record under 
    Wis. Stat. § 227.57
    (1) based on bias of a decision-
    maker     does     not    exist.          Accordingly,        Driftless'        general
    allegations of concern provide no basis from which we could
    conclude that there is a serious risk of actual bias that would
    require disqualification of Huebsch according to Caperton and
    our decision in Miller or that "proper cause has been shown" of
    wrongdoing by Huebsch according to § 227.57(1) based on personal
    friendships.       We agree with the PSC that Driftless' allegation
    "lacks     a    legitimate      factual     basis     to     support     recusal     or
    disqualification."36
    c.     Job Application37
    ¶61       Before    us,   Driftless        implies    that,    because     Huebsch
    applied for the position of CEO of Dairyland Power Cooperative
    months after he resigned from the PSC, there was some kind of a
    quid pro quo going on where Huebsch would                          approve Cardinal-
    Hickory and then be hired by Dairyland.                     Once again, there is
    absolutely no factual evidence to support this theory.                          This is
    simply another attempt by Driftless to create the view that
    Huebsch was biased, which is based on nothing factual except its
    aggressive litigation posture.
    ¶62       What the facts show is that after the PSC's September
    26, 2019 decision on Cardinal-Hickory, Huebsch resigned.                         He had
    36   PSC Order, Sept. 26, 2019, 84.
    37Once       again,       this     concern     was    not      presented     until
    briefing.
    27
    Nos.    2021AP1321-LV & 2021AP1325
    served on the PSC since 2015.                    In January of 2020, the previous
    CEO of Dairyland Power, Barbara Nick, announced that she was
    retiring.      On April 23, 2020, Huebsch submitted an application
    to a search firm for the position of Dairyland Power CEO.                                         He
    was   not    hired;    he     did      not       get       even    an   interview   for          the
    position.
    ¶63    Driftless provided no factual evidence that Huebsch
    presented a serious risk of actual bias in favor of approval of
    Cardinal-Hickory.             There         is        no    factual      evidence      of        any
    wrongdoing by Huebsch.             Unsubstantiated allegations are all that
    Driftless provided.           Therefore, there is no "proper cause," as
    required     under    
    Wis. Stat. § 227.57
    (1),           to   expand   the    record
    created before the PSC on the Cardinal-Hickory line.
    D.       Circuit Court Decision
    ¶64    Because the 
    Wis. Stat. § 227.57
     review of the merits
    of the PSC's approval of Cardinal-Hickory is pending in circuit
    court, this matter will return to the circuit court upon our
    remand.        Accordingly,            we    address          previous     statements            and
    decisions made by the circuit court relative to the PSC approval
    of Cardinal-Hickory.
    1.    Due process violation
    ¶65    In a written order, the circuit court declared "if
    Comm. Huebsch was improperly biased or his participation creates
    an improper appearance of bias, I must vacate the PSC decision
    and   remand    to    the        PSC     for     further          proceedings."38           In     a
    38   Circuit Ct. Decision and Order, May 25, 2021, 9.
    28
    Nos.   2021AP1321-LV & 2021AP1325
    transcript of the motion hearing held July 30, 2021, the circuit
    court also said, "I'm going to call it 'appearance' because that
    really is what it is saying:                       When we can't say that there's
    actually bias, but there's such a high risk of bias that we're
    going to call it a due process violation anyway."39                             The circuit
    court      may    have       recognized      our    decision     in    Miller,     where       we
    clearly stated that a due process violation requires a showing
    of the serious risk of actual bias based on objective factual
    representations.             Miller, 
    392 Wis. 2d 49
    , ¶24.                   We conclude that
    although the circuit court may have understood the law, its
    repeated statements grounded in "the appearance of bias," when
    combined with the lack of factual evidence of communications to
    or   from    Huebsch          on    the    merits    of   Cardinal-Hickory,         are    not
    sufficient to support a due process claim based on a "serious
    risk of actual bias."                     Stated otherwise, no serious risk of
    actual bias was shown here.
    ¶66        It was in part based on this error of what is required
    to   state        a    due       process    violation      that       the     circuit   court
    interpreted           
    Wis. Stat. § 227.57
    (1)      as    being       satisfied        by
    generalized allegations.                   As explained above, the circuit court
    interpreted § 227.57(1) as permitting expansion of the record,
    which      resulted          in     the    subpoenas      to     Huebsch       among    other
    discovery.            In    so     concluding,      the   circuit      court    erred     as    a
    matter of law.             Miller, 
    392 Wis. 2d 49
    , ¶24.
    2.   Subpoenas protection
    39   Circuit Ct. Mot. Hr'g Tr., July 30, 2021, 16.
    29
    Nos.   2021AP1321-LV & 2021AP1325
    ¶67    We    review   the    circuit    court's   decision   that    denied
    Huebsch's motion to quash Driftless' discovery subpoenas and its
    refusal    to    stay   its   discovery     order.      The   purpose     of   all
    subpoenas was to obtain evidence that would permit Driftless to
    expand the record pursuant to 
    Wis. Stat. § 227.57
    (1).
    ¶68    The    discovery       subpoenas     are    prohibited       by    our
    interpretation of 
    Wis. Stat. § 227.57
    (1).              They are not grounded
    in a legally cognizable due process claim.                 The circuit court
    refused the protection sought by Huebsch's motion to quash the
    discovery subpoenas.          We review its order to determine whether
    the circuit court erroneously exercised its discretion.                       Lane,
    
    251 Wis. 2d 68
    , ¶19.             When doing so, we examine whether the
    circuit court applied the correct legal standard.               
    Id.
    ¶69    For the reasons explained above relative to Driftless'
    allegations, the circuit court              herein erroneously        interpreted
    
    Wis. Stat. § 227.57
    (1) and it did not clearly apply the correct
    standard by which to measure whether a due process violation had
    been stated.       It also refused to apply the standard we require
    when a circuit court is meeting a request for a stay of its
    order pending appeal.            See Waity v. LaMahieu, 
    2022 WI 6
    , ¶50,
    
    400 Wis. 2d 356
    , 
    969 N.W.2d 263
    .
    ¶70    As we have explained above in our interpretation of
    
    Wis. Stat. § 227.57
    (1), in order to expand the record created
    before the PSC, Driftless must show "proper cause" by prima
    facie proof of wrongdoing by Huebsch.40              Such proof must be based
    40   Supra, ¶28.
    30
    Nos.   2021AP1321-LV & 2021AP1325
    on facts that show "irregularities in procedure" before the PSC
    in   order    to   satisfy   § 227.57(1).41         A   prima    facie    showing
    requires     objective   facts;   general       allegations     of   concern   are
    insufficient to satisfy the statutory possibility of expanding
    the record beyond that which was created before the PSC.42
    ¶71    Huebsch's   application      for    employment     with    Dairyland
    Power was an event that concerned the circuit court.                   The record
    shows that he submitted an application on April 23, 2020, months
    after he left the PSC.        This event was raised by the affidavit
    of Driftless' attorney alleging that his application evidenced
    "irregularities in procedure before the agency" pursuant to 
    Wis. Stat. § 227.57
    (1).       The circuit court agreed and said:
    I do think there was a prima facie case made as it
    relates to Commissioner Huebsch and the way that it
    was   demonstrated    was    through   a    variety   of
    circumstances that started what I call immediately
    after the decision. . . .    What actions happened that
    were documented showing him exchanging communications
    with one of the owners involved in this decision, it
    looked like if not the very first, one of the earliest
    communications was talking about having a meeting with
    the head of that company, and then it went from there
    with   another  series    of   events  that   ultimately
    culminated in his applying for her job. . . .
    I'm saying that is enough to raise a reasonable
    question whether a commissioner, who was taking those
    kind of actions so quickly after rendering a decision,
    was truly acting impartial or if they had other
    considerations outside of the record in front of them
    on their mind when rendering the decision. . . .
    41   Supra, ¶29 (citing Marris, 
    176 Wis. 2d at 29-30
    ).
    42   Supra, ¶36.
    31
    Nos.    2021AP1321-LV & 2021AP1325
    So enough has been shown to allow further exploration
    under [Wis. Stat. § ] 227.57(1) of exactly what
    happened with Commissioner Huebsch.[43]
    ¶72     The     circuit        court   permitted          discovery      into    whether
    Huebsch acted lawfully in his decision on Cardinal-Hickory by
    ignoring       repetitive         court     decisions      that     uniformly        hold    that
    adjudicators         in      agency    proceedings         are    presumed      to     act   with
    honor and integrity.               Marder, 
    286 Wis. 2d 252
    , ¶34; Withrow, 
    421 U.S. at 47
    .         The    circuit      court       did    not    acknowledge         that
    presumption in the law.
    ¶73     Rather,           instead      of      applying          that     longstanding
    presumption,           the    circuit       court     presumed       that       applying     for
    employment        with       Dairyland        Power    after       the    Cardinal-Hickory
    proceedings          had      concluded       created       a     prima        facie    showing
    sufficient        to      permit      discovery       of    Huebsch's       decision-making
    during the Cardinal-Hickory proceedings.44
    ¶74     As we explained above, Driftless had the burden of
    proving wrongful conduct through specific factual statements of
    Huebsch.45           However,       Driftless        provided      no     specific      factual
    statements by Huebsch and only general allegations about actions
    that        occurred       after      the     Cardinal-Hickory            proceedings         had
    concluded.        These generalized concerns are insufficient to make
    a prima facie showing of "irregularities in procedure before the
    43   Circuit Ct. Oral Arg. Tr., Jan. 21, 2021, 77-79.
    44   
    Id.
    Supra, ¶38 (citing Marder v. Bd. of Regents of the Univ.
    45
    of Wis. Sys., 
    2005 WI 159
    , ¶32, 
    286 Wis. 2d 252
    , 
    706 N.W.2d 110
    ).
    32
    Nos.   2021AP1321-LV & 2021AP1325
    agency."         
    Wis. Stat. § 227.57
    (1); see also Sills, 
    254 Wis. 2d 538
    , ¶¶42, 43.           Stated otherwise, Driftless had the burden to
    show     factual        statements       evidencing      wrongdoing           by    Huebsch.
    Marder, 
    286 Wis. 2d 252
    , ¶24; Withrow, 
    421 U.S. at 47
    .                              However,
    in its ruling, the circuit court actually removed that burden of
    proof from Driftless.                  Instead, the circuit court authorized
    discovery by which Huebsch was questioned to determine if he
    could prove that he did not act unlawfully.
    ¶75       The   circuit    court    erred    in   interpreting           
    Wis. Stat. § 227.57
    (1)        to    permit    discovery,       thereby       expanding         the    PSC
    record      before      § 227.57(1)'s      requirement       of    proper          cause   was
    satisfied.         The circuit court also did not apply the presumption
    of honesty and integrity to Huebsch's service on the PSC.                                    It
    did so based largely on the affidavit of Driftless' attorney,
    who offered no factual statements to or from Huebsch that showed
    he had prejudged the merits of Cardinal-Hickory.                          The inference
    the circuit court accepted was that Huebsch's application for
    employment with Dairyland Power in April of 2020 could show that
    he   had     a    pre-decision     arrangement       worked       out    with      Dairyland
    Power.46
    ¶76       Furthermore, the presumption of honesty and integrity
    is     consistent       with     the    precise     conditions          the    legislature
    established in 
    Wis. Stat. § 227.57
    (1), that, when met, would
    permit      expanding      the    record     that    was     developed         before      the
    agency.          As we explained above, "irregularities in procedure
    46   Circuit Ct. Decision and Order, May 25, 2021, 11.
    33
    Nos.    2021AP1321-LV & 2021AP1325
    before the agency" are permitted to be explored "if proper cause
    is     shown    therefor."                § 227.57(1).              Proper     cause     requires
    specific factual statements by the decision-maker on the merits
    of the matter being decided by the agency.                              Driftless presented
    not    one     example      of       objectively          factual      proof    that     the   law
    requires; and the circuit court erred when it required none.
    3.      Stay pending appeal
    ¶77     After deciding against Huebsch on his motion to quash,
    the circuit court heard Huebsch's motion for a stay pending
    appeal.        A circuit court's decision to grant or to deny a stay
    pending        appeal       is       a    discretionary           decision.            State    v.
    Gudenschwager, 
    191 Wis. 2d 431
    , 439, 
    529 N.W.2d 225
     (1995).                                      A
    stay     pending        appeal           should      be     granted     where      the    moving
    party:       "(1) makes a strong showing that it is likely to succeed
    on the merits of the appeal; (2) shows that, unless a stay is
    granted, it will suffer irreparable injury; (3) shows that no
    substantial          harm   will         come   to     other     interested      parties;      and
    (4) shows that a stay will do no harm to the public interest."
    
    Id. at 440
    .
    ¶78     Here, the circuit court listed the four Gudenschwager
    factors, but did not apply them.                          In regard to the first factor,
    the circuit relied on its prior decisions to conclude that there
    was    "not     a    strong      showing        of     likelihood       to     succeed    on   the
    merits.         In    fact,      I       disagreed        with   Mr.    Huebsch    as     to   the
    34
    Nos.   2021AP1321-LV & 2021AP1325
    arguments on the merits; so I can't find that that factor favors
    a stay pending appeal."47
    ¶79    The court concluded that because it had disagreed with
    Huebsch's       position        in   the      pending    case,     Huebsch      had    no
    likelihood of success on the merits when the matter proceeded on
    appeal.       This is the same error we described in Waity where a
    stay was requested and the circuit court simply referred to its
    own legal reasoning earlier in the pending case as its decision
    on the motion for a stay.                  We held it was error to do so.
    Waity, 
    400 Wis. 2d 356
    , ¶52 (explaining that "a circuit court
    cannot simply input its own judgment on the merits of the case
    and conclude that a stay is not warranted.").
    ¶80    Here, the circuit court did not reexamine the legal
    issues presented and it did not consider the standard of review
    that    the    court      of    appeals    would   apply    to   its      decisions     on
    relevant      legal       issues.       For    example,     it   did      not   seem    to
    understand         that   its   interpretation      of    
    Wis. Stat. § 227.57
    (1)
    would be reviewed de novo by the court of appeals.
    ¶81    Its decision on the remaining Gudenschwager factors is
    equally deficient in applying the law to the facts presented.
    In regard to irreparable injury, the court said, "I simply don't
    see    that    here.       I    mean,   there's    certainly       some    burden     that
    Mr. Huebsch is going to be put to because he's going to have to
    sit    for     a     deposition . . . but          that's    not     an    irreparable
    47   Circuit Ct. Mot. Hr'g Tr., July 30, 2021, 63.
    35
    Nos.    2021AP1321-LV & 2021AP1325
    injury."48             The   court    went    on,       "If    I     grant   this   stay,   I'm
    essentially handcuffing the petitioners from getting some of ––
    what    may       be    some   of    the    most       relevant       information    for    that
    hearing."49
    ¶82     The court did not consider whether the harm done by
    deposing an administrative decision-maker about the substance of
    his decision could be undone on appeal.                              Yet, that is a type of
    irreparable injury that we gave as an example in Waity.                                  Waity,
    
    400 Wis. 2d 356
    , ¶58.                 We do not dwell on the circuit court's
    reasoning on the other Gudenschwager factors because application
    of the law relative to a stay pending appeal was completely
    absent from the circuit court's reasoning.                                Not only did the
    circuit court err in subjecting Huebsch to discovery, it erred
    in not staying its decision pending appeal.
    III.    CONCLUSION
    ¶83     We      conclude      that    in    pretrial          decisions   the    circuit
    court       erroneously        interpreted         
    Wis. Stat. § 227.57
    (1),      which
    interpretation formed the basis for its expansion of the record
    created by the PSC and permitted discovery subpoenas of Huebsch.
    We so conclude because Driftless failed, as a matter of law, to
    satisfy       the       statutory     criteria          or    due     process    requirements
    necessary to expand the record created by the PSC during the
    Cardinal-Hickory proceedings.
    48   
    Id.
    49   
    Id., 65
    .
    36
    Nos.   2021AP1321-LV & 2021AP1325
    ¶84     In   regard     to   the      discovery    subpoenas     issued   to
    Huebsch, we conclude that the circuit court erred when it denied
    Huebsch's   motion     to   quash.        The   circuit    court's    error   is
    grounded    in   its      erroneous       interpretation      of   
    Wis. Stat. § 227.57
    (1) wherein it approved discovery subpoenas.
    ¶85     We further conclude that the circuit court did not
    clearly apply the correct legal standard when evaluating whether
    a due process violation had been stated; we reverse the circuit
    court's July 30, 2021 order denying Huebsch's motion to quash
    discovery    subpoenas;      and     we     conclude    the    circuit    court
    erroneously denied Huebsch's request for a stay pending appeal.
    Accordingly, we reverse the circuit court.
    By the Court.—The order of the circuit court is reversed.
    37
    Nos.   2021AP1321-LV & 2021AP1325.bh
    ¶86       BRIAN HAGEDORN, J.         (concurring).        I agree with much
    of the majority/lead opinion.1               It methodically goes through the
    allegations against Michael Huebsch, former commissioner of the
    Public Service Commission (PSC), and demonstrates why they are
    meritless          and    borderline       frivolous.           It   explains        that
    generalized           allegations    of   bias     come    nowhere    close    to     the
    constitutional due process standard:                     actual bias or "a serious
    risk of actual bias."             See Caperton v. A.T. Massey Coal Co., 
    556 U.S. 868
    , 884 (2009); Miller v. Carroll, 
    2020 WI 56
    , ¶24, 
    392 Wis. 2d 49
    , 
    944 N.W.2d 542
    .
    ¶87       Although I concur in the court's mandate, I arrive at
    substantially the same destination via a different route.                             The
    majority/lead opinion reverses the circuit court's decision not
    to   quash        a    subpoena   for     documents,      but   it   gets    there     by
    overturning a separate, months-earlier, unappealed decision from
    the circuit court to expand the agency record under 
    Wis. Stat. § 227.57
    (1).           I focus instead on the order appealed to us——the
    circuit court's decision not to quash a subpoena for documents
    under 
    Wis. Stat. § 805.07
    (3).                    I agree with the majority/lead
    opinion that the allegations against Commissioner Huebsch do not
    support the circuit court's actions and the subpoena should have
    been quashed.            It appears that the procedural paths taken in
    this writing and in the majority/lead opinion very likely will
    have       the    same   practical      effect     for    Commissioner      Huebsch   on
    remand.          I write separately to explain my analysis and to stress
    why it was important for us to take this case.
    1   I join ¶4 of the majority/lead opinion.
    1
    Nos.    2021AP1321-LV & 2021AP1325.bh
    I
    ¶88        While the majority/lead opinion correctly explains why
    Driftless'           fishing       expedition          must        be     rejected,        it     is
    insufficiently             attentive     to    the      procedural             posture    of    this
    appeal.2         To be sure, this case is a procedural anomaly.                                  The
    opinion centers its analysis on the circuit court's decision to
    expand      the       record       under       
    Wis. Stat. § 227.57
    (1).             But
    Commissioner Huebsch, the petitioner here, was not a party to
    the case when that decision was made, and no party has sought
    leave     to      appeal      that      decision.            See        Wis.    Stat.     § (Rule)
    809.62(1g)(a), (1m)(a)1. (noting that parties may petition for
    review      of    decisions       that     are    adverse          to    the     "party   seeking
    review").            The    opinion      nonetheless           analyzes         § 227.57(1)      and
    concludes the circuit court erroneously exercised its discretion
    in   rendering         a     decision      that        is      not      before     us.         While
    § 227.57(1) is relevant to our inquiry, I do not believe it is
    appropriate to reach down and formally reverse this decision,
    even if the legal rationale proceeds on a parallel path.
    ¶89        Commissioner Huebsch recognized this in his briefing.
    He   does      not    ask    us    to   formally        reverse         the     circuit   court's
    decision under 
    Wis. Stat. § 227.57
    (1), even as he attacks its
    reasoning which served as part of the circuit court's basis for
    denying      the     motion       to    quash.         In    his     reply       brief,   Huebsch
    explained,         "His     interest      in     the    soundness          (or     not)    of   the
    circuit court's earlier reasoning permitting discovery is merely
    2"Driftless" here refers to Driftless Area Land Conservancy
    and the Wisconsin Wildlife Federation. Both parties issued the
    discovery subpoena which Commissioner Huebsch seeks to quash.
    2
    Nos.    2021AP1321-LV & 2021AP1325.bh
    indirect and contingent."                Indeed, "it is not as if Huebsch
    somehow obtains a retroactive right to appeal the old orders."
    Huebsch's quarrel, he explained, formally "lies only with orders
    directed to him."             Therefore, even though I largely agree with
    the majority/lead opinion's critique of the circuit court, I do
    not   join   its    procedural        choice        to     overrule       the   decision   to
    expand the record under § 227.57(1).
    ¶90    Only the circuit court's order denying Commissioner
    Huebsch's motion to quash the discovery subpoena is properly
    before us.      That order was vacated, and as the court of appeals
    identified,        it    is     now     moot.              However,       long-established
    exceptions to the mootness doctrine exist for just such a time
    as this.       Among the relevant considerations, mootness may be
    overlooked     if       "the    issue    is        of     great     public      importance."
    Marathon County v. D.K., 
    2020 WI 8
    , ¶19, 
    390 Wis. 2d 50
    , 
    937 N.W.2d 901
    .      This case is.           The dissent disagrees.                   It wonders
    what all the fuss is about, portraying this as a humdrum case
    getting suspicious and undeserved special treatment.                                 Not so.
    Imagine an ordinary civil case where, months after the decision,
    the   losing    litigant        files    a    motion           alleging   a     Caperton   due
    process claim and asking for the private cell phone records of
    the judge——and a new judge ordered the                             records be produced.
    That would set an extraordinary precedent, worthy of close and
    careful scrutiny.          There would certainly be cause to look twice
    if the subpoena was rooted in mere speculation rather than firm
    evidence,      especially        given       the        exceptionally         high   standard
    needed to establish a Caperton due process claim.                               Against this
    3
    Nos.    2021AP1321-LV & 2021AP1325.bh
    backdrop,        we    would    not    think       twice     of     applying     a    mootness
    exception.
    ¶91       A "that's not this case" argument doesn't work here
    because that is this case.                  The due process claim advanced turns
    on the same standard for adjudicatory bodies like the PSC as it
    does for courts.           Withrow v. Larkin, 
    421 U.S. 35
    , 46-47 (1975)
    (applying judicial bias rules "to administrative agencies which
    adjudicate").             We    have    seen        bias     and     recusal     allegations
    increase        greatly    in   recent       years,        turning       the   obligation   of
    adjudicator impartiality into a litigation weapon.                                   That only
    heightens the importance of these issues to the functioning of
    adjudicatory bodies like the PSC.                     The dissent's nonchalant view
    is misplaced.           There is nothing ordinary about this case; it
    warrants our attention even though the order appealed from is
    moot.3
    II
    ¶92       This leads us to the motion to quash.                          We review a
    motion      to    quash    a    subpoena      for     documents          for   an    erroneous
    exercise of discretion.                 Lane v. Sharp Packaging Sys., Inc.,
    
    2002 WI 28
    ,   ¶¶19-20,       
    251 Wis. 2d 68
    ,           
    640 N.W.2d 788
    .       "A
    discretionary decision will be sustained if the circuit court
    Commissioner Huebsch also seeks review of the circuit
    3
    court's decision to deny a motion for stay pending appeal. That
    issue is moot as well.    But in my view, no mootness exception
    merits reaching that question.         We granted Commissioner
    Huebsch's requested stay when we accepted this case, and we
    recently issued a decision clarifying the proper analysis. See
    Waity v. LeMahieu, 
    2022 WI 6
    , ¶¶48-54, 
    400 Wis. 2d 356
    , 
    969 N.W.2d 263
    .
    4
    Nos.    2021AP1321-LV & 2021AP1325.bh
    has examined the relevant facts, applied a proper standard of
    law,    and,    using        a    demonstrated           rational       process,         reached     a
    conclusion that a reasonable judge could reach."                                     Indus. Roofing
    Servs., Inc. v. Marquardt, 
    2007 WI 19
    , ¶41, 
    299 Wis. 2d 81
    , 
    726 N.W.2d 898
     (quoting another source).
    ¶93     By statute, a circuit court may "quash or modify" a
    subpoena       for   documents         if     the       subpoena     "is    unreasonable           and
    oppressive."           
    Wis. Stat. § 805.07
    (3);           State        v.    Gilbert,      
    109 Wis. 2d 501
    , 509-10, 
    326 N.W.2d 744
     (1982).                                     And a subpoena,
    like     any     other           discovery      request,           is      limited           to   "any
    nonprivileged matter that is relevant to any party's claim or
    defense."       
    Wis. Stat. § 804.01
    (2)(a).                       Here, the scope of review
    is even further limited.                      The proceeding before the circuit
    court is not a case in the normal course, but a review of an
    agency    decision          under      Wis.    Stat.       ch.     227.         Typically,         such
    review is "confined to the record" created by the agency.                                          
    Wis. Stat. § 227.57
    (1).               However, "in cases of alleged irregularities
    in   procedure        before       the      agency . . . depositions                   and    written
    interrogatories         may       be     taken . . . if           proper        cause     is      shown
    therefor."       
    Id.
            Driftless argues that its Caperton due process
    claim    focused       on    Commissioner           Huebsch       constitutes           an    alleged
    irregularity in procedure.
    ¶94     Commissioner Huebsch does not disagree that a Caperton
    due process violation would constitute a procedural irregularity
    under    
    Wis. Stat. § 227.57
    (1).              Rather,         he        contends     that
    Driftless failed to state an even remotely cognizable claim.                                         I
    agree.         As     the        majority/lead           opinion        explains        well,      the
    5
    Nos.       2021AP1321-LV & 2021AP1325.bh
    generalized         accusations,           innuendo,       and     wholesale        speculation
    underlying the bias claims come nowhere close to alleging a
    Caperton       due    process         violation.            Accordingly,           the    records
    demanded       by    the     subpoena——including                 Commissioner            Huebsch's
    cellphone, his communications with a number of individuals both
    in the course of his work as a commissioner and in his private
    life,    and    documents         about        his    decision          to   seek    employment
    elsewhere——are not relevant.                    And a subpoena demanding wholly
    irrelevant documents is unreasonable and oppressive.                                 See State
    v.     Washington,      
    83 Wis. 2d 808
    ,         844,        
    266 N.W.2d 597
            (1978)
    (noting that whether a "subpoena may be attacked" turns in part
    on "the question of relevancy"); AF Holdings, LLC v. Does 1-
    1058, 
    752 F.3d 990
     (D.C. Cir. 2014) ("If a subpoena compels
    disclosure      of    information           that     is    not    properly        discoverable,
    then    the    burden      it     imposes,         however       slight,      is    necessarily
    undue:         why     require         a    party     to     produce         information       the
    requesting party has no right to obtain?"); Compaq Comput. Corp.
    v. Packard Bell Elecs., Inc., 
    163 F.R.D. 329
    , 335-36 (N.D. Cal.
    1995)     ("Obviously,           if     the     sought-after            documents        are   not
    relevant nor calculated to lead to the discovery of admissible
    evidence,       then       any        burden       whatsoever           imposed     upon       [the
    subpoenaed non-party] would be by definition 'undue.'").
    ¶95     Wisconsin law authorizes the quashing of unreasonable
    and oppressive subpoenas.                     
    Wis. Stat. § 805.07
    (3) ("the court
    may . . . quash or modify the subpoena if it is unreasonable and
    oppressive").         As the majority/lead opinion details, it appears
    the circuit court applied a far more relaxed "appearance of
    6
    Nos.    2021AP1321-LV & 2021AP1325.bh
    bias" standard rather than the strict, narrow, and rarely-met
    "serious risk of actual bias" standard that governs.                                   This was
    the    wrong    legal       test.       I    conclude          that    a     reasonable      judge
    examining the facts and applying the proper legal standards to
    both    the    motion       to     quash     the    subpoena           and    the     underlying
    constitutional bias claim could only conclude that the subpoena
    for documents must be quashed.
    ¶96     As    previously         explained,             the     unusual        procedural
    posture of this case means the subpoena for documents is the
    only issue we can or should formally decide.                                  That said, the
    implications         for     further        investigation             regarding       Driftless'
    alleged       bias     claim        against        Commissioner             Huebsch     as     the
    proceedings continue below should be quite clear.
    III
    ¶97     I close with some observations about the importance of
    this case for our system of adjudication.                                  The constitutional
    standard       underlying           a       Caperton       due         process        claim     is
    extraordinarily            high.        It    is    not        whether        some     impartial
    observers      would       think    there's        an    appearance           of    bias.     The
    question is whether actual bias was present, or a serious risk
    of bias so extreme and unusual that it occurs in only the rarest
    of circumstances.            See Caperton, 
    556 U.S. at 887-88
    ; 
    id.
     at 899-
    900    (Roberts,      C.J.,        dissenting).            Any       claim     of    bias    "must
    overcome a presumption of honesty and integrity in those serving
    as adjudicators."            Withrow, 
    421 U.S. at 47
    .                   Unfortunately, this
    "presumption that judges will follow the law regardless of their
    7
    Nos.    2021AP1321-LV & 2021AP1325.bh
    personal views and regardless of their associations is quickly
    being     replaced   by    the    presumption      that     judges   are   frail,
    impressionable, and not to be trusted."              Miller, 
    392 Wis. 2d 49
    ,
    ¶126 (Hagedorn, J., dissenting).
    ¶98    While citizens have a right to expect judges and other
    adjudicators to decide cases impartially, this concern does not
    justify    weaponizing     bias    allegations     and     recusal    to   achieve
    litigation ends.          Legitimate claims have their place, but we
    cannot validate and routinize a litigation tactic that aims its
    fire at the decision-maker rather than the decision.                       Recusal
    and bias claims must not become another missile to be deployed
    anytime a litigant does not like an adjudicator's decision.                    
    Id.
    The constitutional due process guarantee announced in Caperton
    will rarely be met, and therefore should rarely be invoked.                     At
    the end of the day, the Constitution simply does not countenance
    the vague, generalized, and speculative accusations that served
    as   the    basis    for    Driftless'     attacks        against    Commissioner
    Huebsch.     The discovery subpoena against him should have been
    quashed.    I respectfully concur.
    8
    Nos.   2021AP1321-LV & 2021AP1325.jjk
    ¶99        JILL J. KAROFSKY, J.            (dissenting).       It is sometimes
    said that bad facts make bad law.                     Today, bad procedure makes
    bad law.          Plain and simple, this appeal is moot.                  Nevertheless,
    four members of this court transform a "procedural anomaly"1 into
    a procedural tragedy.             These four Justices springboard off an
    appeal about mootness to overreach into matters not before this
    court.        Strikingly, this unbounded exercise of judicial power
    comes with no explanation, leaving all to speculate as to why
    this       case    and   this   subpoena        recipient    receive      such   special
    treatment.          Whatever the reason, my colleagues' indulgence in
    the excesses of judicial power is not grounded in law and serves
    only to deepen inequalities in our system of justice.                          For these
    reasons, I respectfully dissent.
    I.    BACKGROUND
    ¶100 At the center of this interlocutory appeal is Michael
    Huebsch.           During the relevant time frame, Huebsch served as
    Commissioner on the Public Service Commission (PSC) when that
    agency      approved      the   Cardinal-Hickory          Creek    Transmission       Line
    project.              Several     local          governments       and     conservation
    organizations,           including    the       Driftless   Area    Land      Conservancy
    ("Driftless"),           petitioned       for    judicial    review      of    the   PSC's
    approval decision.
    ¶101 Along with legal challenges to the merits of the PSC's
    approval, Driftless alleges Huebsch violated its members' due
    process rights.            Driftless argues that Huebsch's contacts with
    See County of Dane v. PSC, Nos. 2021AP1321-LV, 2021AP1325
    1
    & 2021AP1495-W, unpublished order (Wis. Sept. 21, 2021)
    (Karofsky, J., dissenting).
    1
    Nos.    2021AP1321-LV & 2021AP1325.jjk
    organizations and persons who appeared before him during the
    PSC's consideration of the Cardinal-Hickory Creek project show
    at least a serious risk of actual bias.                                    Evidence of those
    contacts, however, was not in the record created before the PSC.
    This   absence        is    significant;        typically,            judicial       review    is
    limited to the agency record.                       The exception to that general
    rule is set forth in 
    Wis. Stat. § 227.57
    (1), which allows for
    additional       discovery         in   cases       of   "alleged          irregularities      in
    procedure    before         the    agency,"     such        as   a    biased       adjudicator.
    Pursuant to that exception, the circuit court here determined
    that Driftless's allegations of bias met the "irregularities in
    procedure    before         the     agency"     standard         and        were,    therefore,
    sufficient       to        grant    Driftless            leave       to     take    additional
    discovery.
    ¶102 At the time the circuit court rendered its decision
    permitting extra-record discovery, Huebsch was not a party to
    the circuit court's review proceeding (he had since left his PSC
    Commissioner post for the private sector).                                  He first became
    involved in that proceeding when Driftless subpoenaed him to be
    a non-party witness.                The subpoena——a subpoena duces tecum——
    sought    both    Huebsch's         deposition           testimony         and   his   personal
    phone for "imaging" of data relevant to his potential bias.                                   For
    ease of reference, I refer to this as the "Phone Subpoena."
    ¶103 Huebsch filed a motion to quash the Phone Subpoena
    and, alternatively, stay the Phone Subpoena pending appeal if
    the circuit court ruled against him.                         The circuit court denied
    both     motions.           Huebsch     then        appealed         the    circuit    court's
    decisions    to       the    court      of   appeals.            While       the    appeal    was
    2
    Nos.    2021AP1321-LV & 2021AP1325.jjk
    pending, Driftless withdrew the Phone Subpoena.                                The subpoena's
    withdrawal      prompted        the    court          of    appeals      to     conclude         that
    Huebsch's appeal of the now-defunct Phone Subpoena was moot.
    See    County     of    Dane    v.    PSC,        2021AP1321-LV,         unpublished            order
    (Wis. Ct. App. Aug. 18, 2021).
    ¶104 Shortly        thereafter,                Driftless        issued        Huebsch       a
    subpoena     ad       testificandum          to       secure     his     testimony         at    the
    upcoming     trial       scheduled          to     occur       one     month    later.            For
    simplicity,       I     refer   to     this        later       subpoena        as    the    "Trial
    Subpoena."        Upon receipt of the Trial Subpoena, rather than
    asking the circuit court to quash it, Huebsch came directly to
    this court.           He presented us three options for resolving his
    qualms with the ongoing discovery efforts related to him.                                         The
    first     was     the    "extraordinary               and     drastic"        request      for     a
    supervisory writ.          See State ex rel. Kalal v. Cir. Ct. for Dane
    Cnty., 
    2004 WI 58
    , ¶17, 
    271 Wis. 2d 633
    , 
    681 N.W.2d 110
    .                                    In the
    same petition, Huebsch alternatively asked that we exercise our
    similarly       "extraordinary"             superintending           authority        over       the
    circuit court to micromanage its discovery decisions.                                 See State
    v. Jerrell C.J., 
    2005 WI 105
    , ¶83, 
    283 Wis. 2d 145
    , 
    699 N.W.2d 110
     (Abrahamson, C.J., concurring) (quoting State v. Helms, 
    136 Wis. 432
    ,      464-65,       
    118 N.W. 158
          (1908)     (Winslow,             C.J.,
    concurring)).          Finally, he filed a more traditional petition for
    review.
    ¶105 The        petition       for        review       challenged       the    court       of
    appeals' decision that Huebsch's appeal over the Phone Subpoena
    was moot.       In an apparent attempt to add a law-developing issue
    3
    Nos.      2021AP1321-LV & 2021AP1325.jjk
    to    a    petition     otherwise      seeking       error    correction,2           Huebsch
    suggested that his case presented a good vehicle for integrating
    the       "voluntary    cessation"      mootness         exception       recognized         by
    federal       courts    into    Wisconsin      law.          Behind      that       mootness
    question, however, were additional, purely "error correcting"
    issues.        These    include:       (1) how       a    court    is    to     apply      the
    standard for a stay pending appeal——an issue for which we had
    already accepted review in a different case;3 (2) the correct
    standard for adjudicator bias under the Due Process Clause of
    the   Fourteenth        Amendment——an     issue       that    simply      asked       us    to
    repeat the legal standard we had articulated                            only    14 months
    prior;4 and (3) how Driftless's specific allegations fit within
    the   settled        "serious   risk    of   actual        bias"      standard——issues
    calling for "merely the application of well-settled principles
    to the factual situation" stemming from the earlier (and never-
    appealed) order to expand the record.5                    A bare majority of this
    court      granted     Huebsch's    petition     for      review   over        my    dissent
    explaining how an interlocutory appeal over a decision declining
    to    quash     a    subpoena    presented       a    "procedural         anomaly"         for
    2"The supreme court's primary function is that of law
    defining and law development," while the court of appeals'
    "primary function is error correcting."     Cook v. Cook, 
    208 Wis. 2d 166
    , 188–89, 
    560 N.W.2d 246
     (1997).
    3That identical issue had already be accepted for review a
    month earlier.       See Waity v. LeMahieu, No. 2021AP802,
    unpublished order (Wis. July 15, 2021).
    4See Miller v. Carroll, 
    2020 WI 56
    , 
    392 Wis. 2d 49
    , 
    944 N.W.2d 542
    .
    5Our review criteria, however, disfavor                              "merely the
    application  of   well-settled   principles   to                          the   factual
    situation." Wis. Stat. § (Rule) 809.62(1r)(c)1.
    4
    Nos.   2021AP1321-LV & 2021AP1325.jjk
    addressing the more substantive adjudicator-bias standard.                          See
    County    of   Dane     v.    PSC,       Nos.      2021AP1321-LV,      2021AP1325     &
    2021AP1495-W, unpublished order (Wis. Sep. 21, 2021).                         We were
    unanimous,     however,      in    denying        Huebsch's    two    "extraordinary"
    requests for either a supervisory writ or an exercise of our
    superintending authority.              Id.
    II.       ANALYSIS
    ¶106 Four of my colleagues err in two fundamental respects.
    First, this case is moot and no mootness exception applies.
    That should be the end of this case.                      Unfortunately, it's not.
    The majority/lead and concurring opinions overreach into matters
    not     properly   before         us    in    a       manner   that    can   only   be
    characterized      as   an    exercise           of    superintending    authority——
    despite our unanimous decision not to exercise that authority in
    this case.     That is the second error.                  I address each error in
    turn.
    A.    This Case is Moot
    ¶107 Shortly after the court of appeals dismissed as moot
    the   matter    concerning        the    Phone        Subpoena,   Driftless    served
    Huebsch with the Trial Subpoena.                      Huebsch claims the voluntary
    withdrawal of the Phone Subpoena followed by the issuance of the
    later Trial Subpoena proves his appeal should not have been
    dismissed.      Huebsch posits this series of events falls within
    the "voluntary cessation" exception to mootness recognized under
    federal law but not under Wisconsin state law.                         The voluntary
    cessation mootness exception holds that when a party voluntarily
    ends challenged conduct, that cessation may not render a case
    5
    Nos.   2021AP1321-LV & 2021AP1325.jjk
    moot if the challenged conduct may be reasonably expected to
    recur following dismissal of the action.                               See Friends of the
    Earth,     Inc.     v.     Laidlaw       Env't        Servs.           (TOC),       Inc.,    
    528 U.S. 167
    , 189 (2000).
    ¶108 While this "voluntary cessation" argument served as
    Huebsch's law-developing hook, neither the majority/lead opinion
    nor the concurrence develop the law.                       The majority/lead opinion
    mushes the distinct "voluntary cessation" exception into one of
    our   existing          mootness      exceptions:          capable        and       likely    of
    repetition        and     yet        evades        review.             See      majority/lead
    op., ¶¶25-26.           Regardless of which exception to mootness the
    majority/lead opinion is actually applying——voluntary cessation
    or capable and likely of repetition yet evades review——neither
    theory works here.          That is because the conduct and legal issues
    here are not capable and likely of repetition; the two subpoenas
    materially differ.
    ¶109 The "capable and likely of repetition and yet evades
    review"     mootness       exception,         as     we    recently          emphasized,      is
    "limited to situations involving 'a reasonable expectation that
    the same complaining party would be subjected to the same action
    again.'"      Portage       County       v.    J.W.K.,          
    2019 WI 54
    ,     ¶30,   
    386 Wis. 2d 672
    , 
    927 N.W.2d 509
     (quoting State ex rel. Clarke v.
    Carballo,     
    83 Wis. 2d 349
    ,    357,        
    265 N.W.2d 285
       (1978)).
    Likewise, the "voluntary cessation" exception applies only when
    an action "sufficiently similar" to the challenged conduct is
    reasonably     expected         to     recur.         See       Ne.     Fla.     Chapter     of
    Associated Gen. Contractors of Am. v. City of Jacksonville, 
    508 U.S. 656
    , 662 n.3 (1993).
    6
    Nos.    2021AP1321-LV & 2021AP1325.jjk
    ¶110 Here, Huebsch supposes that the Phone Subpoena and the
    Trial Subpoena establish "repetition."                  But the two subpoenas
    differ substantially both as a matter of fact and as a matter of
    law.      Factually,   the       subpoenas    differ    in   scope.         The   Phone
    Subpoena    would    have        permitted    Driftless      to   probe      relevant
    aspects of Huebsch's phone and required Huebsch to sit for a
    deposition.     By contrast, the Trial Subpoena demands much less
    of Huebsch, requiring only that he appear at trial to offer
    truthful testimony.
    ¶111 As a matter of law, different legal standards govern
    quashing the two subpoenas.              Our decision in State v. Gilbert,
    
    109 Wis. 2d 501
    , 
    326 N.W.2d 744
     (1982) delineates this legal
    distinction.        Gilbert       involved    a   ten-year-old       girl    who   was
    served with a subpoena ad testificandum requiring her to appear
    in court and testify about her mother's abuse of her and her
    sister.     The circuit court quashed the subpoena, reasoning that
    the child's best interest was better served by not appearing in
    the same courtroom as her abuser, which could trigger severe
    psychological       harm    and     re-traumatize       her.       The      defendant
    appealed.     On appeal, the victim claimed the circuit court had
    the    authority     to         quash   her    subpoena      under     
    Wis. Stat. § 805.07
    (3), which permits a court to quash or modify a subpoena
    "if it is unreasonable and oppressive."
    ¶112 This court reinstated the subpoena, concluding that
    § 805.07(3) applied only to a subpoena duces tecum; a subpoena
    ad    testificandum,       by    contrast,    could    not   be   quashed     on    the
    grounds that it was unreasonable and oppressive or contrary to
    the child's best interest.               Gilbert, 
    109 Wis. 2d at 508-17
    .
    7
    Nos.    2021AP1321-LV & 2021AP1325.jjk
    Though     seemingly          harsh,       the       court       underscored               just    how
    fundamental a subpoena ad testificandum is to our legal system.
    It    explained     that      "a     fundamental         tenet       of    our       modern       legal
    system[]       is   that      the    public      has     a    right       to    every       person's
    evidence," including the President of the United States.                                            
    Id.
    at 505    (citing,       e.g.,       United      States        v.    Nixon,          
    418 U.S. 683
    (1974)).       The court highlighted the maxims that "each person has
    a duty to testify" and that the "integrity of the [adversarial]
    legal    system     depends         on    the    court's        ability         to    compel       full
    disclosure of all relevant facts under the rules of evidence."
    
    Id.
         Thus, the court concluded a ten year old's physiological
    harm and re-traumatization was not enough for a court to quash a
    subpoena ad testificandum.
    ¶113 These        factual         and     legal        distinctions            control      the
    analysis.        Huebsch's appeal challenged only the decision not to
    quash    the     Phone     Subpoena——a          subpoena        duces      tecum.           On     that
    issue,     the      legal      standard          was     whether          the        subpoena      was
    "unreasonable and oppressive."                       But under Gilbert, a different
    standard would apply to Huebsch's Trial Subpoena——a subpoena ad
    testificandum.           These factual and legal differences means the
    two    subpoenas      are      not       the    "same        action"      nor        "sufficiently
    similar."       See J.W.K., 
    386 Wis. 2d 672
    , ¶30; Ne. Fla. Chapter of
    Associated Gen. Contractors, 
    508 U.S. at
    662 n.3.
    ¶114 These        differences            also    mean        the    challenged             Phone
    Subpoena is not reasonably likely to recur.                                See Laidlaw Env't
    Servs., 
    528 U.S. at 189
    .                   Driftless averred that it would not
    issue another subpoena duces tecum to Huebsch.                                       The court of
    appeals    relied        on    that       averment,          meaning      Driftless          is    now
    8
    Nos.    2021AP1321-LV & 2021AP1325.jjk
    judicially estopped from serving Huebsch with another subpoena
    duces      tecum.     See     State      v.    Ryan,       
    2012 WI 16
    ,   ¶¶32-33,     
    338 Wis. 2d 695
    ,     
    809 N.W.2d 37
    .         The     majority/lead        opinion's
    contrary assertion rests on a failure to appreciate the factual
    and legal differences between these two subpoenas.                               And because
    the     Phone    Subpoena         and    the    Trial        Subpoena      are    materially
    different, the cited mootness exceptions do not apply.
    ¶115 The concurrence takes a slightly different tack that
    fares no better.             In the concurrence's view, the adjudicator-
    bias       standard    is     an    issue       of     "great      public        importance."
    Concurrence, ¶90            (quoting       Marathon          County       v.     D.K.,     
    2020 WI 8
    , ¶19, 
    390 Wis. 2d 50
    , 
    937 N.W.2d 901
    ).                              Perhaps, but this
    court recently published a comprehensive opinion setting out the
    proper       adjudicator-bias            standard         making    it     unnecessary       to
    revisit the issue here.                 See Miller v. Carroll, 
    2020 WI 56
    , 
    392 Wis. 2d 49
    , 
    944 N.W.2d 542
    .
    ¶116 Putting the issue's perceived importance aside, I fail
    to see why we needed to intervene through a moot interlocutory
    appeal.         Had the trial been allowed to proceed without this
    court's      meddling       and    had    the       final    judgment      deemed       Huebsch
    unconstitutionally           biased,       then       a     traditional        appeal     would
    squarely raise the very same adjudicator-bias issue.                              The bottom
    line is that the adjudicator-bias issue serves as no excuse to
    overlook mootness in this interlocutory appeal.                                The appeal is
    moot without exception.
    B.    An Inappropriate Exercise of Superintending Authority
    9
    Nos.   2021AP1321-LV & 2021AP1325.jjk
    ¶117 Four members of this court barrel past this appeal's
    mootness with analyses that can only be explained as expansive
    exercises of our superintending authority.                            To explain, even if
    this court could overlook mootness here, then the only discovery
    issue properly before us would be whether the circuit court
    erroneously exercised its discretion when it declined to quash
    the Phone Subpoena.               In resolving that issue, the legal question
    we ask is whether the circuit court applied the "proper legal
    standard."          See, e.g., State v. Dobbs, 
    2020 WI 64
    , ¶32, 
    392 Wis. 2d 505
    ,      
    945 N.W.2d 609
    .       The     proper        legal    standard
    governing       a    subpoena        such       as     the    Phone      Subpoena       is       the
    "unreasonable          and        oppressive"           standard         in     
    Wis. Stat. § 805.07
    (3).         See Gilbert, 
    109 Wis. 2d at 509-10
    .                       That would be
    the extent of our inquiry.
    ¶118 Not         interested         in     limiting       themselves       to     the    Phone
    Subpoena    and      the     narrow       legal       issue   it   raises,       four       of    my
    colleagues          instead        exercise           this      court's         extraordinary
    superintending        authority         to      reach    an    issue     not     before      this
    court,    the       adjudicator-bias            standard.          The    adjudicator-bias
    issue    arises      solely       out     of    the     circuit    court's       decision         to
    expand the record.                But the decision to expand the record was
    never part of this appeal; the deadline to appeal that ruling
    expired before Huebsch filed this appeal.                             Tellingly, not even
    Huebsch was so bold as to ask that we reverse a decision that
    occurred     before          he     was        involved       in   the        circuit        court
    proceedings.          See    Opening         Br.     Pet'r    at   51;    Reply       Br.    Pet'r
    at 18.     Undeterred, four member of this court micromanage the
    circuit court's application                    of the adjudicator-bias standard.
    10
    Nos.   2021AP1321-LV & 2021AP1325.jjk
    Because that issue belongs to the record-expansion decision not
    before    us,       such     micromanagement            is    clearly      an   exercise     of
    superintending authority.
    ¶119 Not willing to admit as much, both the majority/lead
    opinion       and    concurrence          attempt        to     conceal     their      use   of
    extraordinary power behind a novel legal theory that a subpoena
    must be grounded in a "cognizable" claim.                            But the veil is thin.
    Neither Huebsch nor my colleagues cite a single case from any
    jurisdiction that actually supports their theory.                               Indeed, the
    theory's novelty lays bare my colleagues' procedural mischief.
    Had   this     interlocutory         appeal       challenged         the   circuit       court's
    decision to expand the record, I would agree that the issue
    before us is the "proper legal standard" for showing adjudicator
    bias under 
    Wis. Stat. § 227.57
    (1).                      But again, that decision was
    not appealed.             Huebsch instead appealed the later decision not
    to quash the Phone Subpoena.                    As such, this appeal presents only
    the issue of whether the circuit court applied the "proper legal
    standard"       for        showing        a     subpoena        is     "unreasonable         and
    oppressive"          under       
    Wis. Stat. § 805.07
    (3).            This       novel
    "cognizable" claim theory conflates the adjudicator-bias issue,
    which is not before us, with the narrower Phone-Subpoena issue,
    which    is    the    only       matter       before    us.      In    short,     this    novel
    theory——found no where in the law——operates to obscure what is
    otherwise       an    exercise       of       superintending          authority     to    reach
    matters not before the court.
    ¶120 In my colleagues' fervor to reach issues beyond this
    appeal's procedural posture, they fail to appreciate the dire
    consequences         of    the    "cognizable"          claim    theory.        This      theory
    11
    Nos.    2021AP1321-LV & 2021AP1325.jjk
    allows a subpoenaed witness to raise what amounts to a motion to
    dismiss   the      claim    underlying        the    subpoena.         In    allowing      a
    subpoenaed       witness    to    question     the     merits    of    the       underlying
    claim, a majority of this court creates an entirely new class of
    persons within a case who now have the right to reach back to
    challenge earlier merits decisions on which their subpoenas are
    predicated.       And if a circuit court does not amend its earlier
    merits decision, then this new class of subpoenaed witnesses can
    request     an     interlocutory         appeal      challenging        that        earlier
    decision's legal merits and demand that proceedings be stayed
    pending that appeal.6            In the end, this novel "cognizable" claim
    theory    provides     for       a    disruptive       new    tool     in    a     subpoena
    recipient's toolbox——at least for those select witnesses with
    the means to advance it.
    ¶121 Though four members of this court engage in a blatant
    exercise of superintending authority, they stay largely silent
    on why Huebsch's non-party appeal deserves such extraordinary
    treatment.        That's problematic.           Our superintending power "is
    not to be exercised upon light occasion, but only upon some
    grave exigency" and "extraordinary hardship."                        State v. Cir. Ct.
    of Milwaukee Cnty., 
    143 Wis. 282
    , 285, 
    127 N.W. 998
     (1910).
    What's    the     "grave     exigency"?             Where's     the     "extraordinary
    hardship"    here?         Certainly     it   cannot     be     the   mere       fact   that
    Huebsch     would    have        to   give    truthful        testimony      about       his
    conversations with friends and contacts who appeared as parties
    before him.         Not even a ten-year-old abuse victim who faces
    6 Stunningly, Huebsch claims such an interlocutory appeal
    would be as of right for non-party witnesses like him.
    12
    Nos.     2021AP1321-LV & 2021AP1325.jjk
    psychological       harm    and   re-traumatization             by    having      to   appear
    before   her    abuser       to     detail        her     abuse      has    received      the
    extraordinary       relief    granted        to     Huebsch.          See    Gilbert, 
    109 Wis. 2d 501
    .        Inconvenience and the discomfort that comes with
    having private relationships exposed to public view simply are
    not enough to excuse a subpoenaed witness from his "duty to
    testify."    
    Id. at 505
    .
    ¶122 While the concurrence is more forthcoming with it's
    reasoning, it still falls prey to Huebsch's not-so-subtle scare
    tactic repeated throughout his filings and at oral argument that
    if this could happen to him, then it could happen to a Justice
    as well.     True enough.           But if our government is truly one of
    laws and not men and women, then we cannot use extraordinary
    constitutional       powers       to    carve       out     special        treatment      for
    ourselves     and    only     person's        like       us.      Everyday        Wisconsin
    citizens respect their civic duty and testify in court despite
    the hardships that testifying may bring.                       That remains true even
    when their subpoenas ultimately prove to be the result of legal
    error.      Neither       Huebsch      nor    any       Justice      of    this   court    is
    absolved from this duty to testify.                     See Gilbert, 
    109 Wis. 2d at 505
     (holding that "each person has a duty to testify" because
    the public's "right to every person's evidence . . . applies to
    all of us——even the President of the United States" (citing
    Nixon, 
    418 U.S. 683
    )).            We are not above other witnesses and the
    procedures we adhere to should reflect that.
    ¶123 To that end, I conclude by observing that consistency
    across     cases     is     integral         to     this       court's      institutional
    legitimacy.     Like cases should be treated alike.                          Here, we are
    13
    Nos.   2021AP1321-LV & 2021AP1325.jjk
    left with a vexing question:               what distinguishes Huebsch from
    the ten-year-old abuse victim in Gilbert?                     My colleagues offer
    no satisfying answer.
    III.    CONCLUSION
    ¶124 In this moot appeal, a bad procedural posture makes
    bad   law.      Though   we     unanimously           voted     not   to    exercise
    superintending authority in this appeal, four members of this
    court make an about face by indulging in that extraordinary
    power to reach matters not before us.                  My colleagues provide no
    acceptable principle or explanation for why this case called for
    such a blunt exercise of judicial power.                     For these reasons, I
    respectfully dissent.
    ¶125 I   am   authorized       to   state       that    Justices     ANN   WALSH
    BRADLEY and REBECCA FRANK DALLET join this dissent.
    14
    Nos.   2021AP1321-LV & 2021AP1325.jjk
    1