California waivers
Supply-Side Regulations & Clean Vehicles
As Congress votes to undermine California’s sovereignty to set supply-side standards on polluting vehicles, CLEE’s research shows why these policies are so effective
In May 2025, both the U.S. House and Senate passed resolutions to revoke California’s Clean Air Act waivers, which allow the state to enforce stricter vehicle emissions rules than federal standards (see Ann Carlson’s post on this issue). If signed by the President—and if successful in the face of court challenges to their dubious legality—these …
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CONTINUE READINGSenate Parliamentarian Confirms that California Waivers Are Not Subject to the Congressional Review Act
Will Republicans honor her determination?
As I have previously written, the Trump Administration is attempting an end run around the administrative process it is supposed to follow if it intends to revoke the waiver California received for three important programs to cut air pollutants from cars and trucks. You can find the details about this end run around — using …
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