California filed a lawsuit late Friday against the U.S. Department of Transportation and Secretary Sean Duffy, challenging the federal government's decision to withhold over $33 million in grant funding for the state’s commercial vehicle safety programs. The Trump administration terminated the grants in October, citing California’s alleged failure to enforce English proficiency requirements for commercial truck drivers.

California’s Argument:
The state contends in its lawsuit, filed in U.S. District Court for the Northern District of California, that its enforcement of English-language standards is compatible with federal rules. It calls the funding cutoff "arbitrary and capricious, an abuse of discretion, and contrary to law," warning it would endanger road safety and cause significant economic harm. California notes that drivers with its commercial licenses are involved in 39% fewer fatal commercial vehicle accidents than the national average.

Broader Federal Crackdown:
The move is part of a broader Trump administration push concerning commercial drivers:

• In August, the State Department paused all worker visas for commercial truck drivers.
• In September, the DOT issued emergency rules to drastically restrict commercial driver licenses (CDLs) for non-U.S. citizens following a fatal crash and a government audit.
• Also on Friday, the DOT threatened to pull $73 million in funding from New York over CDLs allegedly improperly issued to non-citizens.

Political Context:
The administration has repeatedly threatened funding for Democratic-led states and cities over various policies, including infrastructure projects and immigration-related driver licensing. An April 2025 executive order reversed 2016 guidance that had prevented inspectors from placing drivers out of service solely for lacking English proficiency—a pre-existing but unevenly enforced federal law.

Significance:
The withheld funds support critical safety operations, including roadside inspections, traffic enforcement, safety audits, and public education. With approximately 16% of U.S. truck drivers foreign-born, the policy clash highlights tensions between federal enforcement priorities, state autonomy, and supply-chain labor concerns. The lawsuit sets up a major legal battle over federal grant conditions and highway safety authority.