Trump Administration Sues California Over Vehicle Emission Rules

Lawsuit targets state's nation-leading standards aimed at curbing pollution from cars

Mar. 12, 2026 at 10:18pm

Got story updates? Submit your updates here. ›

The Trump administration has filed a lawsuit against California over the state's nation-leading vehicle emission standards, which are aimed at curbing pollution from cars. The lawsuit comes as gas prices climb amid the Iran war and some drivers consider going electric.

Why it matters

California has long been able to set stricter emissions standards than the federal government, and other states can adopt California's rules. This lawsuit is the latest move in an ongoing battle between the Trump administration and California over environmental regulations.

The details

The federal government claims California doesn't have the authority to enforce even its less stringent emissions standards, despite the state saying previously adopted standards would remain in effect. California has some of the nation's worst air pollution and has for decades been able to seek approval from the EPA to adopt stricter emissions rules.

  • The Trump administration filed the lawsuit on March 12, 2026.
  • Last summer, Trump blocked California's first-in-the-nation ban on the sale of new gas-powered cars by 2035.

The players

Donald Trump

The former president who has long fought California's efforts to curb tailpipe emissions and spur electric vehicle adoption.

Gavin Newsom

The Democratic governor of California, whose office blasted the lawsuit, noting it comes as gas prices climb amid the Iran war and as some drivers consider going electric.

Pam Bondi

The U.S. Attorney General who said "Oppressive, expensive electric vehicle mandates drive up costs for American consumers and violate federal law."

Dan Farber

The faculty director of the Center for Law, Energy, and the Environment at the University of California, Berkeley's law school, who said it's "ironic" the lawsuit is happening when people are most worried about gas prices.

Got photos? Submit your photos here. ›

What they’re saying

“Gas prices are soaring nationwide because of Trump's reckless choices, and now he's attacking the Golden State for trying to give Californians more freedom and cheaper options.”

— Anthony Martinez, Spokesperson for Gov. Gavin Newsom

“Oppressive, expensive electric vehicle mandates drive up costs for American consumers and violate federal law.”

— Pam Bondi, U.S. Attorney General

“It's ironic that they're doing this just at the time when people are most worried about gas prices.”

— Dan Farber, Faculty director, Center for Law, Energy, and the Environment, UC Berkeley Law

What’s next

The lawsuit will likely lead to a legal battle over California's ability to set its own vehicle emission standards, which could have implications for other states that have adopted California's rules.

The takeaway

This lawsuit is the latest chapter in the ongoing clash between the Trump administration and California over environmental regulations. The outcome could have far-reaching consequences for the future of vehicle emissions standards and the push for electric vehicles across the country.