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US sues California over zero emission vehicle, greenhouse gas rules

By Thomson Reuters Mar 12, 2026 | 8:03 AM

WASHINGTON, March 12 (Reuters) – The Trump administration on Thursday ​sued the ‌state of California, claiming the state’s zero-emission vehicle and tailpipe ‌greenhouse ​gas ⁠emissions rules are ⁠illegal and preempted by federal law.

The U.S. Transportation Department ​sued the California Air Resources ⁠Board in ⁠the U.S. ​District Court over vehicle ​rules that remain in ‌place even after President Donald Trump signed ⁠legislation last year to overturn California’s Advanced Clean ⁠Cars ‌II waiver ⁠to phase out ​gasoline-powered ‌cars by 2035, ​but ⁠its prior rules remain in effect.

(Reporting by David Shepardson; Editing by Sharon ​Singleton)