The Trump administration sued California over its zero-emission vehicle rules, claiming they violate federal authority over fuel standards.

The Trump administration has filed a lawsuit against California over its zero-emission vehicle regulations, claiming that the state's requirements—which call for automakers to sell more electric vehicles and phase out gasoline-powered vehicles by 2035—violate federal law by establishing national fuel economy standards, an authority that belongs to the federal government. The Department of Justice and Department of Transportation filed the lawsuit, alleging that the regulations increase the cost of cars, interfere with interstate commerce, and require automakers to retool their production lines. Despite Congress revoking the state's power to prohibit new gasoline-powered vehicles after 2035, it contests California's ongoing enforcement of its Advanced Clean Cars I regulations. With possible repercussions for EV adoption and national vehicle regulations, the case emphasizes the ongoing struggle between federal and state environmental authority.