California Supreme Court Reins in ‘Blanket’ Challenges Against Judges

Why It Matters

Limiting blanket challenges protects judicial independence and prevents case‑flow disruptions, preserving public confidence in California’s courts.

Key Takeaways

• California Supreme Court restricts blanket challenges under section 170.6.
• Parties now must prove bad‑faith intent before judge disqualification.
• Judge Erin Guy Castillo faced 325 disqualification motions in four months.
• Decision aims to preserve judicial independence and case‑flow efficiency.

Pulse Analysis

Blanket challenges have long been a procedural tool in California, allowing a litigant to request a judge’s removal by invoking section 170.6 of the state’s civil procedure code. First endorsed by the Supreme Court in 1977, the practice was intended to guard against actual bias, but over the decades it evolved into a strategic weapon. Lawyers increasingly filed mass disqualification motions to pressure judges, especially in specialty courts such as family and juvenile dependency, where expertise matters. The cumulative effect was a growing backlog and a chilling effect on judicial decision‑making, prompting the high court to revisit the doctrine.

The catalyst for the recent ruling was a 2024 dispute in San Joaquin County, where Superior Court Judge Erin Guy Castillo was targeted in roughly 325 disqualification filings over a four‑month span in conservatorship cases. The county’s aggressive use of section 170.6 forced the judge’s reassignment and highlighted how the mechanism could be abused to stall proceedings. Under the new standard, a moving party must now present a prima facie case of bad‑faith intent, shifting the burden from the judge to the challenger. This procedural safeguard is expected to reduce frivolous filings, preserve judges’ caseload continuity, and limit costly reassignments.

Beyond California, the decision signals a broader judicial trend toward protecting court independence from tactical litigation tactics. By tightening the threshold for disqualification, the court reinforces the principle that judges should not be swayed by the threat of removal, thereby enhancing the predictability of case outcomes for businesses and litigants alike. Other jurisdictions observing the ruling may consider similar reforms, especially where high‑volume litigation threatens to overwhelm court resources. The move underscores the balance courts must strike between ensuring impartiality and maintaining efficient administration of justice.