Battle lines drawn over automakers' calls for fuel review

Automakers enjoying lucrative sales of trucks and sport utility vehicles are hoping United States President Donald Trump makes good on his vows to deregulate.

Environmental groups are saying fuel efficiency standards won't be watered down without a legal challenge.

"We'll see him in court," Dan Becker, director of the Safe Climate Campaign, said of the group's planned response if the rules are revisited. "There are a lot of reasons to keep the standards in place and there will be a fight."