Big winner: The API. They bought themselves a win.
Big losers: Voters (this means you). Your voice, as spoken through your elected representative, is weaker because of this.
This was passed using the Congressional Review Act, which is a statute that allows the Senate to nullify rules issued by federal agencies with a simple majority vote. This was done solely to get around the filibuster. Republicans in Congress knew they didn't have the 60 votes necessary to push it through the proper way, so they used the Congressional Review Act.
Why is the Congressional Review Act improper? Because the EPA waiver is just that, a waiver, not a rule or regulation. The Government Accountability Office had already defined this in 2023.
Running this decision through the Congressional Review Act in direct defiance of the Government Accountability Office is a setup for a court showdown.
This is a play to nullify the filibuster and consolidate power. It has very little to do with California or emissions.