Sean Patrick Duffy (born October 3, 1971) is an American politician, prosecutor, former sports commentator and reality television personality. He first entered public life as a cast member on The Real World: Boston and 2002's Real World/Road Rules Challenge: Battle of the Seasons, before going on to serve as district attorney of Ashland County, Wisconsin and the U.S. Representative for Wisconsin's 7th congressional district. He is a member of the Republican Party.