Bad-Faith Blanket § 170.6 Challenges Are Subject to Separation-of-Powers Review via a Batson-Style Procedure

I. Introduction

Case: J.O. v. Superior Court (Cal. May 28, 2026) S287285.
Parties: Petitioner J.O. (a conservatee) sought writ relief against the San Joaquin County Superior Court; the San Joaquin County Public Conservator (represented by San Joaquin County Office of the Counsel (“County Counsel”)) was the real party in interest.
Core issue: Whether alleged blanket, bad-faith use of Code of Civil Procedure section 170.6 (the “automatic” affidavit-of-prejudice disqualification) can be challenged as applied under the separation of powers doctrine—and, if so, what procedure governs.

The petition arose from allegations that, after Judge Erin E. Guy Castillo admonished a County Counsel attorney, County Counsel adopted a blanket practice of disqualifying Judge Guy Castillo from conservatorship matters—estimated at roughly 325 section 170.6 challenges in under four months—leading to her reassignment. The trial court (Judge Kristine A. Eagle) denied petitioner’s opposition as barred by Solberg v. Superior Court (1977) 19 Cal.3d 182, and the Court of Appeal summarily denied writ relief.

II. Summary of the Opinion

The Supreme Court of California overruled Solberg v. Superior Court (1977) 19 Cal.3d 182 to the extent it foreclosed separation-of-powers as-applied challenges to blanket abuses of section 170.6. The Court held:

  • If the opponent of a section 170.6 motion timely objects and makes a prima facie showing that the movant is engaging in bad faith blanket challenges against a judge, the court may look beyond the facially compliant affidavit/oral statement and inquire into the legitimacy of the asserted “prejudice.”
  • The Court adopted a Batson-like burden-shifting framework (analogizing to Batson v. Kentucky (1986) 476 U.S. 79), including a prompt hearing before a judge other than the challenged judge once a prima facie showing is made.

Because the lower courts treated petitioner’s objection as categorically barred under Solberg, the Supreme Court remanded to the Court of Appeal to determine what further proceedings were necessary under the newly articulated rule.

III. Analysis

A. Precedents Cited

1. The foundational arc: from unconstitutional peremptory disqualification to “automatic” disqualification with safeguards

  • Austin v. Lambert (1938) 11 Cal.2d 73: The Court invalidated former section 170.5 because it gave litigants uncontrolled power to dislodge a qualified judge without stating reasons—an “unlawful interference” and a “concealed weapon” against the judiciary. J.O. uses Austin as the constitutional baseline: legislative disqualification mechanisms cannot defeat core judicial functioning.
  • Johnson v. Superior Court (1958) 50 Cal.2d 693: Upheld section 170.6 facially, stressing the affidavit/oath requirement and other safeguards (one challenge per side; timeliness rules) to minimize abuse. J.O. reaffirms Johnson’s facial approval and preserves section 170.6’s purpose: addressing hard-to-prove judicial prejudice while maintaining litigant confidence.
  • McCartney v. Commission on Judicial Qualifications (1974) 12 Cal.3d 512: Recognized section 170.6 as an “extraordinary right” and “mandatory” when compliant; also referenced as an example of evidence of an office policy to challenge a judge broadly (“on all trials”), illustrating how blanket practices may be proven.

2. The key precedent overruled in part

  • Solberg v. Superior Court (1977) 19 Cal.3d 182: Reaffirmed section 170.6’s facial constitutionality and held that even abusive blanket challenges did not “substantially impair” trial courts’ constitutional jurisdiction, characterizing abuse as a “relatively inconsequential price” for an “efficient and discreet procedure.” J.O. rejects that assessment as no longer viable given modern court conditions. The Court also embraces the concern articulated in Solberg’s concurring and dissenting opinion (Tobriner, Acting C. J.), which argued the judiciary should not be helpless against abusive blanket challenges and that “prejudice” refers to disposition toward a party, not anticipated adverse rulings.

3. Intermediate appellate pressure points prompting reconsideration

  • People v. Superior Court (Tejeda) (2016) 1 Cal.App.5th 892: Described large-scale prosecutorial challenges (46 of 49 murder cases) after an adverse ruling, producing a “crisis” and backlog; nevertheless felt bound by Solberg. J.O. explicitly heeds Tejeda’s call to revisit Solberg and cites its separation-of-powers critique and its rejection of Solberg’s “self-limiting” rationale.
  • NutraGenetics, LLC v. Superior Court (2009) 179 Cal.App.4th 243: Cited for appellate frustration with inability to curb abuses under then-existing doctrine; supports the Court’s conclusion that judicial helplessness is untenable.

4. Separation-of-powers framework authorities

  • Steen v. Appellate Division of Superior Court (2014) 59 Cal.4th 1045: Provides the controlling test: separation of powers is violated when one branch’s actions “defeat or materially impair” another’s inherent functions. J.O. uses Steen to reclassify blanket abuses as constitutionally consequential, not merely administratively inconvenient.
  • Case v. Lazben Financial Co. (2002) 99 Cal.App.4th 172: Defines “effective administration of justice” as a “core judicial function” and grounds the judiciary’s inherent authority to manage business.
  • People v. Engram (2010) 50 Cal.4th 1131 and Lorraine v. McComb (1934) 220 Cal. 753: Quoted for the judiciary’s right to control its order of business to safeguard litigant rights; used to frame how mass disqualifications distort assignment control.
  • Alvarez v. Superior Court (2010) 183 Cal.App.4th 969: Cited for presiding judge authority under California Rules of Court, rule 10.603(c)(1) to make assignments—authority threatened when litigants can effectively dictate who hears a docket.

5. Analogies to peremptory juror challenges and the adopted procedure

  • Batson v. Kentucky (1986) 476 U.S. 79: Supplies the three-step burden-shifting model. J.O. borrows Batson’s structure to “confine section 170.6 to its proper application” without destroying its utility.
  • People v. Armstrong (2019) 6 Cal.5th 735, People v. Gutierrez (2017) 2 Cal.5th 1150, People v. Hardy (2018) 5 Cal.5th 56, People v. Cleveland (2004) 32 Cal.4th 704, People v. Stanley (2006) 39 Cal.4th 913: Provide California’s Batson elaborations (prima facie inference from totality; burden shift; “clear and reasonably specific” reasons; focus on subjective genuineness; presumption of regularity), which J.O. imports into the new section 170.6 inquiry.

6. Out-of-state decisions recognizing constitutional limits on blanket judicial disqualification

  • State of Minnesota v. Erickson (1999) 589 N.W.2nd 481: Recognized broad systemic disruption from blanket filings affecting many citizens’ cases; supports J.O.’s resource-impact analysis.
  • State of Arizona v City Court of Tucson (1986) 150 Ariz. 99: Held blanket prosecutorial disqualifications undermined judicial independence; cited as parallel to the separation-of-powers harm identified in California today.
  • People ex rel. Baricevic v. Wharton (1990) 136 Ill.2d 423: Most influential procedurally: adopted a Batson-patterned hearing to police abuses of a peremptory judicial disqualification power; J.O. essentially California-izes that approach.

7. Authorities illustrating abuse vectors

  • People v. Williams (1992) 8 Cal.App.4th 688: Cited for the possibility of racial discrimination via peremptory judicial challenges; used to underscore why absolute immunity from inquiry is untenable.
  • McClenny v. Superior Court (1964) 60 Cal.2d 677: Quoted for the maxim that protective devices cannot become weapons of offense.
  • Barrett v. Superior Court (1999) 77 Cal.App.4th 1 and La Seigneurie U.S. Holdings, Inc. v. Superior Court (1994) 29 Cal.App.4th 1500: Stand for the prior regime’s “no inquiry” mandate when a motion is timely and proper—precisely what J.O. now limits in the narrow, prima-facie blanket-abuse scenario.

B. Legal Reasoning

1. What changed since Solberg: the factual predicate for the constitutional balance

The Court does not repudiate section 170.6’s legitimacy; it repudiates Solberg’s empirical and institutional judgment that blanket abuses are an “inconsequential price.” The Court identifies multiple systemic developments that transform the separation-of-powers calculus:

  • Caseload growth and complexity (e.g., felony filings rising from 54,653 in 1977 to 179,821 in 2023–2024).
  • Budgetary constraints and staffing shortages, including documented judge shortages and case dismissals in some counties.
  • Proliferation of specialty courts and specialized calendars, where assignment stability is central to effectiveness.
  • Sweeping legislative/voter-driven legal changes that require expertise and consistent administrative deployment (e.g., CARE Act proceedings; diversion programs; resentencing regimes).

In this environment, blanket disqualifications can (in the Court’s view) “materially impair” the judiciary’s core function of administering justice and the presiding judge’s constitutional/statutory authority to assign judicial business.

2. Identifying the constitutional conflict: legislative scheme vs. judicial function

The Court frames the separation-of-powers clash as arising between the legislative and judicial branches: the statute’s no-inquiry design, when exploited in bad faith at scale, allows litigants to effectively usurp assignment authority. The Court rejects limiting the doctrine to executive-branch actors: although institutional litigants (e.g., prosecutors) may pose heightened risk, the constitutional defect is that section 170.6’s terms prevent scrutiny even when blanket abuse is plausibly shown—regardless of who the abuser is.

3. The new rule: a narrow gateway to inquiry, not a rewrite of section 170.6

The Court carefully preserves the “automatic” nature of ordinary, case-specific section 170.6 challenges by creating a threshold: only when an opponent (a) timely objects and (b) makes a prima facie showing of a bad faith blanket policy does any inquiry occur. This design is justified as a way to keep section 170.6 constitutional in operation while preventing the statute from becoming an instrument to “materially impair” judicial administration.

4. The Batson-like procedure

  1. Step 1 (prima facie showing): The opponent must show that the “totality of the relevant facts gives rise to an inference” of a bad faith blanket policy, not merely vigorous use. Persistent strikes against the same judge in all/substantial portion of the judge’s assigned cases, or in a case-type docket, may suffice. The Court flags contextual indicators such as an abrupt increase after an adverse ruling (as in Tejeda).
  2. Step 2 (movant’s explanation): If a prima facie case exists, a hearing “as soon as possible” occurs before a judge other than the challenged judge. The movant must offer a “clear and reasonably specific” explanation showing a good faith basis for believing the judge is prejudiced in the particular case. The movant need not prove actual prejudice; the inquiry targets subjective genuineness and case-related circumstances.
  3. Step 3 (ultimate finding): The court decides whether the opponent has proved the challenges are in fact part of a bad faith blanket policy. If bad faith is found, the 170.6 motion is denied and the case remains; if good faith is found, the motion is granted and the case is reassigned.

Importantly, the Court disclaims broader interventions (e.g., a categorical bar on government attorneys filing 170.6 motions), characterizing such measures as legislative in nature.

C. Impact

1. Doctrinal impact: partial overruling of Solberg and recognition of as-applied review

The headline consequence is that blanket abuses are no longer immune from constitutional scrutiny. This is a targeted, structural holding: it does not undermine the facial constitutionality of section 170.6 or the ordinary rule that compliant motions are granted without inquiry; it authorizes inquiry only when a prima facie showing suggests the statute is being used to impair judicial administration.

2. Administrative impact: protecting assignment authority and specialized calendars

The decision strengthens presiding judges’ ability to maintain stable staffing of specialized dockets (conservatorships, mental health proceedings, collaborative courts, etc.) by deterring litigant strategies designed to force reassignment of a disliked judge. It also addresses systemic spillovers: mass disqualifications require redistribution of work, increase backlogs, and may distort the court’s ability to match expertise to complex proceedings.

3. Behavioral impact: deterring “retaliatory” and “strategic” patterns

J.O. directly targets patterns alleged to be used to “intimidate, punish, and/or silence” judges (as described in People v. Superior Court (Tejeda) (2016) 1 Cal.App.5th 892). Because the new mechanism makes patterns litigable (upon prima facie showing), offices and firms must anticipate record development and potential hearings.

4. Litigation impact: new evidentiary and procedural disputes

The ruling will generate litigation over: (a) what constitutes “all or a substantial portion” of a judge’s cases; (b) what data sources and time windows establish a prima facie showing; (c) how “good faith” is demonstrated without revealing privileged strategy; and (d) how courts manage expedited hearings without bogging down calendars. Still, the Court’s design (high threshold; presumption of regularity; hearing only upon prima facie showing) aims to contain satellite litigation.

5. Potential constitutional spillovers: discrimination-based challenges

By observing that few would accept that Solberg forecloses inquiry into racially motivated disqualification efforts (citing People v. Williams (1992) 8 Cal.App.4th 688), the Court signals a broader principle: where section 170.6 is plausibly being used as an instrument of constitutional harm, the judiciary must have tools to respond.

IV. Complex Concepts Simplified

  • Section 170.6 “automatic” disqualification: A party can remove a judge by timely declaring under oath that the judge is “prejudiced,” without proving actual bias, and traditionally without the court questioning the claim.
  • “Blanket challenges”: A practice of repeatedly filing section 170.6 challenges against the same judge across many cases (often a docket category), potentially to drive the judge out of an assignment.
  • Separation of powers: The constitutional rule that prevents one branch from defeating or materially impairing another branch’s core functions. Here, the judiciary’s core function includes managing its caseload through assignments and ensuring effective administration of justice.
  • “As-applied” vs. “facial” constitutional challenge: A facial challenge attacks a law in all its applications; an as-applied challenge attacks how it is used in a specific context. J.O. keeps section 170.6 facially valid but allows as-applied challenges when the statute is exploited in bad faith at scale.
  • Batson-style burden shifting: A three-step process: (1) the objector shows enough to raise an inference of improper use; (2) the user gives a genuine, specific explanation; (3) the court decides if improper use is proven. J.O. imports this to police bad faith blanket judge challenges while preserving ordinary automatic challenges.
  • Good faith “prejudice” vs. disagreement with rulings: “Prejudice” refers to a judge’s attitude toward a party, not a prediction based on prior rulings or judicial philosophy. Using section 170.6 because a judge ruled against you is improper.

V. Conclusion

J.O. v. Superior Court marks a significant recalibration of California’s judicial disqualification doctrine. While reaffirming the facial constitutionality and day-to-day utility of section 170.6, the Court holds that bad faith blanket abuses can rise to a separation-of-powers violation by materially impairing the judiciary’s core administrative and assignment functions in the modern era of high caseloads, specialization, and resource constraints.

The decision’s operative innovation is procedural and pragmatic: a Batson-like, burden-shifting inquiry triggered only by a timely objection and a prima facie showing of blanket bad faith. In doing so, the Court partially overrules Solberg v. Superior Court (1977) 19 Cal.3d 182, ends categorical judicial helplessness in the face of mass disqualification tactics, and supplies trial courts with a structured method to protect judicial independence without dismantling section 170.6.