California continues to push back on Trump administration actions and policies. The latest is a decision not to buy state vehicles from certain companies because of clean car rules. This is the latest in the ongoing fight between California and the Trump administration over climate-warming pollution from cars and trucks. 

The Trump administration wants to roll back Obama-era targets to reduce greenhouse gas pollution and increase fuel economy. In the meantime, the Environmental Protection Agency and the National Highway Traffic Safety Administration have taken away California's power to police tailpipe pollution on its own terms. 

CalMatters Environment Reporter Rachel Becker has been writing about this move and the battle over emissions controls at the state versus the federal government.