The Trump administration is poised to revoke California's authority to set auto mileage standards, asserting that only the federal government can regulate greenhouse gas emissions and fuel economy.
Conservative and free-market groups have been invited to attend an announcement of the rollback Wednesday afternoon at the Environmental Protection Agency headquarters in Washington.
The move comes after the Justice Department opened an antitrust investigation into a deal between California and four automakers for tougher pollution and mileage requirements than those sought by President Donald Trump. Trump also has sought to relax Obama-era mileage standards nationwide, weakening a key effort to slow climate change.
The White House declined to comment Tuesday, referring questions to the EPA. The EPA didn't respond to requests seeking comment.
