Gavin Newsom’s legislative minions just got a lesson in constitutional supremacy

# Why This Matters

California's "No Vigilantes Act"—officially AB 331, passed in 2021—was supposed to block Immigration and Customs Enforcement agents from entering schools, hospitals, and courthouses without a judicial warrant. The law created a $2,500 civil penalty for violations and gave private citizens the right to sue federal agents. A three-judge panel of the Ninth Circuit Court of Appeals just unanimously dismantled it, ruling that California cannot use state law to obstruct federal immigration enforcement, invoking the Supremacy Clause of the Constitution. This is not a narrow technical ruling—it directly contradicts the state's foundational legal strategy for immigration policy and signals limits to state sovereignty that extend far beyond California.

The stakes are immediate and concrete. AB 331 was centerpiece legislation for California's "sanctuary state" approach, part of a broader ecosystem of restrictions designed to make ICE operations more difficult. The law applied not just to state employees but to private citizens suing on behalf of undocumented immigrants. California's Attorney General Xavier Becerra (now Biden's HHS Secretary) championed the law as a check on federal overreach. The Ninth Circuit's decision means ICE agents can now enter these protected locations without state-level legal exposure, restoring operational latitude they'd lost under state law. For immigration advocates and state officials, this removes a key lever of resistance; for the federal government, it removes an obstacle. The practical effect: more ICE access to vulnerable populations in sanctuaries that thought they'd blocked it.

The Supremacy Clause doctrine here echoes a line of cases going back to *Gibbons v. Ogden* (1824), where the Supreme Court established that federal power over interstate commerce cannot be obstructed by state law. But the modern parallel is closer to *United States v. Brignoni-Ponce* (1975) and the steady constitutional principle that states cannot regulate federal immigration enforcement itself—only their own police and services. California tried to thread a needle by saying it wasn't regulating immigration but merely restricting where state facilities could be used. The court rejected that framing. Once federal authority is involved, state obstruction via law falls.

The conservative read is straightforward: California's political class built an apparatus to undermine federal law from within the executive bureaucracy—and got caught violating the Constitution in the process. The "No Vigilantes Act" was not a neutral civil procedure; it was a calculated obstruction designed to make ICE enforcement impossible in the state's largest cities. By weaponizing private rights of action and sanctuary locations, Sacramento created a parallel legal system to block deportations. The Ninth Circuit's unanimous decision—not a close 2-1 split—signals there is no serious constitutional argument for what California attempted. States have no power to deputize private citizens to sue federal agents for lawful enforcement activities. This is basic federalism. The decision restores the constitutional baseline.

Watch the California legislature's response. Becerra and his successor are already signaling new legislative gambits—likely focusing on worker protections or data privacy rather than direct operational obstruction. But the space for that maneuvering just contracted significantly. Also watch whether this decision spreads to other Ninth Circuit holdings that have sheltered similar state sanctuary measures; the unanimity here suggests appetite to clean house. The Supreme Court is unlikely to grant cert on a case where the lower court was this unified, which means the Ninth Circuit's baseline stands. ICE will test its new operational freedom in California within months.