The Trump administration is preparing to revoke California’s air pollution standards for cars and light trucks, in its latest regulatory rollback of laws aimed at slowing the climate crisis. The move, which is expected to be announced this week, seeks to cancel California’s agreement with Ford, Honda, Volkswagen and BMW that would see passenger vehicles average about 50 miles per gallon by 2026. The Trump administration has proposed freezing auto efficiency at 2020 levels, or around 37 miles a gallon. Thirteen states and Washington, D.C., have promised to adopt California’s more stringent air quality rules, and California lawmakers have promised to challenge the rollback in court. This comes as President Trump is traveling to California today for fundraisers in Silicon Valley and Los Angeles.