This year’s filing deadline for candidates running for the U.S. House of Representatives in Pennsylvania was March 10, 2026.
Rep. Summer Lee (D) is the only incumbent running in a contested primary this year. That's the fewest number of incumbents running in a contested primary since 2014. There were three incumbents in contested primaries in 2024, two in 2022, two in 2020, six in 2018, four in 2016, and two in 2014.