Duffy represented Wisconsin’s 7th Congressional District from 2011 until his early retirement in 2019. He has been on television for over 25 years.

President-elect Donald J. Trump nominated the former representative from Wisconsin to oversee a sprawling agency that includes aviation, rail and transit.

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