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

Long before being chosen as President-elect Trump's pick for Transportation secretary, Sean Duffy had a reality TV career in Boston. What to know

Here’s what you need to know about Sean Duffy, who was nominated by President-elect Donald Trump to head the agency overseeing aviation, rail, and transit.