WASHINGTON _ California and like-minded states are girding for a legal battle with the Trump administration on whether those states have gone too far in controlling greenhouse gases from automobiles, a prospective case that legal scholars say _ barring a last-minute settlement _ is sure to reach the U.S. Supreme Court.
The Environmental Protection Agency and other federal agencies are expected to announce, as soon as this week, a rollback of national fuel economy standards for vehicles. They could also revoke California's ability to set its own, tougher, air pollution limits.
If the Trump administration challenges California's long-standing latitude to set its own emissions rules, it would be wading into untested legal waters, said Deborah Sivas, a law professor and expert on the Clean Air Act at Stanford University.
