Bartholomew Thomas "Bart" Stupak (/ˈstuːpæk/; born February 29, 1952) is an American politician and lobbyist. A member of the Democratic Party, Stupak served as the U.S. Representative from Michigan's 1st congressional district from 1993 to 2011.
Stupak chose not to seek re-election in 2010. He departed Congress in January 2011, and was succeeded by Dan Benishek, a Republican from the Upper Peninsula. Stupak is now a lobbyist with Venable LLP.