Trump is expected to make Matt Gaetz his attorney general and Marco Rubio his secretary of state, and place Tulsi Gabbard, Kristi Noem and Stephen Miller in key posts.

If approved, Duffy would oversee a complex system of pipelines, railroads, cars, trucks, airlines and mass transit systems, as well as funding for highways.

Get the latest news on the transition to the new administration of President-elect Donald Trump and a new Congress.