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

The Senate has overruled the guidance of the parliamentarian, a nonpartisan staffer who interprets the Senate's rules, and voted 51 to 44 to overturn a waiver allowing California to set its own air po...

The Senate’s move follows similar action in the House, which this month voted 246-164 for a resolution to rescind a federal waiver that gave a green light to California’s EV mandate.