DOJ subpoenas automakers who sided with California against Trump

The U.S. Justice Department has issued civil subpoenas to four major automakers, demanding that they disclose details on a deal struck with California in July to follow strict vehicle emissions standards, a source briefed on the matter said on Thursday. The Justice Department is carrying out an antitrust investigation into the voluntary agreement. It comes against a growing number of fights between the Trump White House and California on a number of fronts, including numerous environmental issues.