“Over the past four years, General Motors has emerged as one of President Trump’s favorite corporate targets. He attacked the company repeatedly for closing a plant in Ohio and lashed out at it even when the automaker offered to make ventilators this spring in response to the coronavirus pandemic.
And Mr. Trump ridiculed the company’s chief executive, Mary T. Barra, one of the few women to lead a large U.S. corporation. “Always a mess with Mary B,” he wrote on Twitter in March.
The company and Ms. Barra have not responded to the presidential wrath, but on Monday G.M. broke ranks with the White House on the one major issue where they were aligned. The automaker said it would no longer back the Trump administration in a fight with California over clean-air standards.
California has sought tougher standards on tailpipe emissions to battle climate change. The Trump administration loosened Obama-era standards and revoked the authority of California and other states to set their own rules, which led to a lawsuit from several states. G.M., Toyota Motor and Fiat Chrysler intervened in the lawsuit on behalf of the administration. A few other automakers, including Ford Motor, BMW and Volkswagen, sided with California.
G.M.’s support for the Trump administration surprised many auto experts given the president’s repeated attacks on the company and Ms. Barra. It also seemed to be an odd position for G.M. to take because the automaker has outlined ambitious plans to add nearly two dozen electric models to its lineup.
In a letter to the leaders of some of the nation’s largest environmental groups on Monday, Ms. Barra indicated G.M. was now backing President-elect Joseph R. Biden Jr. in his plan to cut emissions and support the use of electric vehicles.”