Former Wisconsin congressman Sean Duffy was sworn in as new U.S. Transportation Secretary this week. Here's what his responsibilities include.

Sean Duffy was sworn in as Transportation Secretary on Tuesday and is now grappling with the fallout of the deadliest aviation disaster in the U.S. in 23 years. Duffy was most recently the co-host of “The Bottom Line” on Fox Business,

Duffy has quickly emerged as the public face of the federal government’s response to the deadly plane crash at Washington’s Reagan National Airport.