SD’s Thune and Rounds Support U.S. Senate Vote to Block Tailpipe Emissions Standard
- On May 30, 2025, the U.S. Senate voted 51-44 to block California's waiver allowing stricter vehicle emissions standards.
- This vote followed Senate Republicans' effort to use the Congressional Review Act, which experts say is an inappropriate and possibly unlawful use against California’s waiver.
- California's waiver has enabled it and 16 other states plus DC to enforce tougher air pollution limits and push a zero-emission vehicle mandate starting in 2026, aiming for 35% ZEV sales that year and full emissions-free new cars by 2035.
- The Senate's decision went against the assessment provided by both the Parliamentarian of the Senate and the Government Accountability Office, which determined that the Congressional Review Act could not be used to eliminate the emissions waiver.
- As a result, California announced preparations to sue the federal government and launched an 11-state coalition to defend clean car standards and expand access to affordable zero-emission vehicles.
31 Articles
31 Articles


SD’s Thune and Rounds support U.S. Senate vote to block tailpipe emissions standard
The U.S. Senate voted early Thursday to prevent California from enforcing regulations on tailpipe emission from new cars and trucks, upending state regulations for the nearly 40% of Americans whose states follow California standards.
U.S. Senate vote to nix California tailpipe emissions standard blocks 17 other states • Florida Phoenix
Highway 170 in North Hollywood, California. (Photo by Trevor Srednick/Getty Images)The U.S. Senate voted early Thursday to prevent California from enforcing regulations on tailpipe emission from new cars and trucks, upending state regulations for the nearly 40% of Americans whose states follow California standards. The House has already passed an identical measure, meaning the Senate vote sends the resolution to President Donald Trump’s desk. Th…
Republicans nix California tailpipe emissions standard, blocking pollution reduction measures for 40% of Americans
Highway 170 in North Hollywood, California. (Photo by Trevor Srednick/Getty Images)The U.S. Senate voted early Thursday to prevent California from enforcing regulations on tailpipe emission from new cars and trucks, upending state regulations for the nearly 40% of Americans whose states follow California standards. The House has already passed an identical measure, meaning the Senate vote sends the resolution to President Donald Trump’s desk. Th…
U.S. Senate vote to nix California tailpipe emissions standard blocks Pa. and 16 other states • Pennsylvania Capital-Star
Highway 170 in North Hollywood, California. (Photo by Trevor Srednick/Getty Images)The U.S. Senate voted early Thursday to prevent California from enforcing regulations on tailpipe emission from new cars and trucks, upending state regulations for the nearly 40% of Americans whose states follow California standards. The House has already passed an identical measure, meaning the Senate vote sends the resolution to President Donald Trump’s desk. Th…
U.S. Senate vote to nix California tailpipe emissions standard blocks Colorado and other states
Highway 170 in North Hollywood, California. (Photo by Trevor Srednick/Getty Images)The U.S. Senate voted early Thursday to prevent California from enforcing regulations on tailpipe emission from new cars and trucks, upending state regulations for the nearly 40% of Americans whose states follow California standards. The House has already passed an identical measure, meaning the Senate vote sends the resolution to President Donald Trump’s desk. Th…
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