Glenn William "GT" Thompson Jr. (born July 27, 1959)[citation needed] is an American politician serving as the U.S. representative for Pennsylvania's 15th congressional district since 2019.

"[4] After the Stoneman Douglas High School shooting in 2018, Thompson told an audience of students that he did not agree with the idea of arming teachers and had voted to fund an improved national background check system.

[8] In December 2020, Thompson was one of 126 Republican members of the House of Representatives to sign an amicus brief in support of Texas v. Pennsylvania, a lawsuit filed at the United States Supreme Court contesting the results of the 2020 presidential election, in which Joe Biden defeated[9] incumbent Donald Trump.

The Supreme Court declined to hear the case on the basis that Texas lacked standing under Article III of the Constitution to challenge the results of an election held by another state.

[14] In January 2025, Thompson praised President Donald Trump's proposals to implement 25% tariffs on most goods from Canada and Mexico, saying it was an “effective tool” for “ensuring fair trade for American producers.”[15] Thompson was elected the U.S. representative from Pennsylvania's 5th congressional district, defeating Democratic nominee Mark McCracken, 58%–42%.

In May 2018, Susan Boser, a professor at Indiana University of Pennsylvania, won the Democratic nomination in Thompson's district, defeating Wade Johun in her party's primary.

[citation needed] Thompson defeated the Democratic nominee, Lewisburg Borough Council Member Mike Molesevich, 70%–30%.