California sues Trump for blocking its clean-air rules for cars, trucks — and vows to set new mandates

By CalMatters Staff 

Many legal experts, along with the Government Accountability Office and Senate Parliamentarian, said Congress has no authority to revoke the waivers.

California Attorney General Rob Bonta filed suit against Trump and EPA Administrator Lee Zeldin, arguing that it’s an unlawful use of the review act.

“Trump’s all-out assault on California continues – and this time he’s destroying our clean air and America’s global competitiveness in the process. We are suing to stop this latest illegal action by a President who is a wholly-owned subsidiary of big polluters,” Gov. Gavin Newsom said in a statement today.

Ten other states that are enforcing California’s emissions rules joined the lawsuit — Colorado, Delaware, Massachusetts, New Jersey, New Mexico, New York, Oregon, Rhode Island, Vermont and Washington.

Newsom also issued an executive order that reaffirms the state’s commitment to phasing out gas and diesel-powered vehicles. He directed the Air Resources Board to craft another mandate for cars and trucks — to either bolster its existing mandates or replace them in case they lose in court.

Newsom also directed the air board to create a public list of automakers and truck manufacturers that are following California’s emissions rules, and companies that take early action to convert fleets to zero-emission trucks “regardless of the status of those regulations under federal law.” And he ordered state agencies within 60 days to determine what more can be done to help consumers with the transition to electric vehicles, including eliminating obstacles to building more charging stations.

Because of its highly polluted air, Congress gave California the power to set its own, more stringent vehicle standards in the 1967 Clean Air Act. Before now, the federal government has never blocked any of California’s dozens of rules.

Under California’s mandate enacted in 2022, 35% of new 2026 model cars sold in the state must be zero-emissions, ramping up to 68% in 2030 and 100% in 2035. It builds on decades of tightening emissions standards for cars sold in the state.

Congress also blocked California’s 2020 Advanced Clean Trucks rule, an unprecedented measure that requires manufacturers to meet ramped-up targets for zero-emission heavy and medium-duty trucks for 2024 through 2035. A third vote revoked the waiver for a 2020 state regulation reducing nitrogen oxides — a key ingredient of smog — emitted by trucks and buses.

Trump said his actions mean those rules “are fully and expressly preempted by the Clean Air Act and cannot be implemented.”

“Our Constitution does not allow one State special status to create standards that limit consumer choice and impose an electric vehicle mandate upon the entire Nation,” he wrote. (California’s mandate applies only to vehicles sold in the state; the other states agreed to enact the same rules.)