State of California

Rule Changes

Leading the October 2 lawsuit over the CAFE rollback alongside federal climate litigation

The Transportation Department's final fuel-economy rule, published September 28, sets the 2031 fleetwide target at 34.9 miles per gallon, down from 50.4 under President Biden. It also rewrites standards for model years 2022 through 2026 and ends the credit trading that let automakers buy and sell efficiency gains, starting in 2028.

Updated Oct 24

Rule Changes

As of September 2026: Enacted the strongest child safety AI laws in the nation

Anthropic has stopped letting people under 18 use Claude. The change, posted in the company's support documentation, makes the AI assistant adults-only.

Updated Sep 11

Rule Changes

As of August 2026: Plaintiff

The Ninth Circuit on August 21 vacated a district court ruling that had struck down part of the ATF's 2022 ghost gun regulation. A unanimous panel found that California and the Giffords Law Center to Prevent Gun Violence lacked standing to challenge Example 4 of the frame-and-receiver rule.

Updated Aug 23

Rule Changes

As of May 2026: Leading AI regulator whose laws are explicit targets of the federal order.

Donald Trump just turned AI regulation into a states' rights knife fight. His new executive order creates a Justice Department "AI Litigation Task Force" to attack state AI laws. Washington can threaten to withhold $42 billion in broadband funds from states that don't comply.

Updated May 11

Force in Play

As of May 2026: Challenging Trump’s domestic military deployments while hosting new NDA

Donald Trump has quietly turned long stretches of the southern border into de facto military bases. Under a new system of National Defense Areas, soldiers can stop migrants, hold them, and help prosecutors charge them as trespassers on military land.

Updated May 11