He has publicly questioned climate change. The NHTSA chief would have to initiate a full rule-making process to set looser standards, which took two years during the first Trump administration.

Duffy said the rules need to better align with the administration’s overarching agenda because “the existing CAFE standards promulgated by NHTSA are ... to address climate change, which ...

Hours after being sworn in as the new U.S. Secretary of Transportation, Sean Duffy took aim at the main way the federal ...