Hours after being sworn in as the new U.S. Secretary of Transportation, Sean Duffy took aim at the main way the federal government regulates miles per gallon for cars and pickup trucks — also a ...

Doug Burgum, Kristi Noem, and Sean Duffy—are among President-elect Donald Trump’s Cabinet nominees. Their potential ...

Mr. Duffy, a former congressman who had appeared on track to sail through with little opposition, overcame a last-minute ...