Glenn William "GT" Thompson Jr. (born July 27, 1959) is an American politician serving as the U.S. representative for Pennsylvania's 15th congressional district since 2019. A member of the Republican Party, he was first elected to Congress in 2008 for the state's 5th congressional district; Thompson was redistricted to the 15th congressional district in the 2018 election by an order of the Supreme Court of Pennsylvania. Since 2021, he serves as the ranking member of the House Agriculture Committee.