The ruling—which will also effect the 17 states and the District of Columbia that follow California’s standards—is decried by ...

Legal experts say Congress misused a federal law to do so, potentially “opening up a Pandora’s box it cannot close.” ...

In its press release, the California Governor’s Office pointed to the decades of precedent upholding California’s waiver, which is protected by the Clean Air Act. It also pointed out that the ...

The U.S. Senate on Thursday voted to block California’s first-in-the-nation regulations that would ban the sale of new ...

Trucking groups call it common sense. California and clean-air advocates call it unconstitutional. Here's what just happened to California's emissions rules — and what's next.

WASHINGTON—The GOP-led Senate voted Thursday to take away California’s ability to set its own tailpipe emissions standards, ...

California’s authority to set environmental rules that are tougher than national standards had never been challenged by ...

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

Today’s decision could upend California’s phaseout of gas-powered cars and diesel trucks, and its battle against air ...

California officials announced their intentions on Thursday to file their 23rd lawsuit against the Trump administration — this time, over an attempt to upend the state’s stricter-than ...

The Senate voted 51-44 to overturn California’s electric-vehicle mandate via the Congressional Review Act on Thursday, ...