State officials vowed to sue the Trump administration, calling it an attack on the state’s decadeslong effort to fight pollution.

Senate Republicans led the push to block California's ability to impose tough limits on car emissions — a move Democrats call unprecedented.

The U.S. Senate on Thursday voted to block California’s first-in-the-nation regulations that would ban the sale of new gasoline-powered passenger vehicles statewide in 2035, setting up a certain legal battle over the future of electric cars in the United States.