Why did the DOJ investigate California’s auto emission standards deal?

The Justice Department launched an antitrust violations investigation into last year’s deal between California and four major automakers. Now, POLITICO’s Alex Guillen and Leah Nylen are reporting that a top DOJ official says the investigation was motivated by the president’s ongoing fight with California. Kelsey Tamborrino is a Politico Energy reporter.Irene Noguchi is the executive producer of Politico's audio department.Jenny Ament is the senior producer of Politico's audio department.Carlos Prieto is a Politico podcast producer.