Federal Appeals Court Blocks California Law Requiring Federal Agents to Display Identification

The 9th U.S. Circuit Court of Appeals has issued an injunction against a California law that required federal immigration agents to display identification while on duty. The court determined that the law "attempts to directly regulate the United States in its performance of governmental functions," which is prohibited by the Supremacy Clause of the Constitution.

The law, enacted in 2025, was challenged by the Trump administration, which argued that it endangered officers and violated constitutional principles by allowing the state to regulate federal operations. A three-judge panel, including Judges Mark J. Bennett, Daniel P. Collins, and Jacqueline H. Nguyen, unanimously agreed with this position.

California officials contended that the law applied equally to all law enforcement officers and aimed to address public safety concerns by preventing confusion during law enforcement encounters. They argued that the absence of visible identification could lead to officers being mistaken for criminals, posing risks to both officers and the public.

The court, however, did not consider these public safety arguments, focusing instead on the constitutional issue of state regulation of federal activities. First Assistant U.S. Attorney Bill Essayli described the ruling as a "huge legal victory."

This decision follows a February ruling by a federal judge that blocked another California law banning most law enforcement officers from wearing masks, citing similar constitutional concerns.