Ten incumbent U.S. House lawmakers have lost their primaries during the 2026 election cycle, including three Republicans and seven Democrats. The defeated incumbents represent a range of districts and tenures in Congress.
Among the Republican incumbents who lost their bids for re-election were Dan Crenshaw of Texas, Thomas Massie of Kentucky, and Andy Ogles of Tennessee. Crenshaw, who has served in the House since 2019, was defeated in the Republican primary for Texas' 2nd Congressional District by state Rep. Steve Toth. While former President Donald Trump did not initially endorse either candidate, he later backed Toth.
Thomas Massie, a representative for Kentucky's 4th Congressional District since late 2012, lost the Republican primary to Trump-backed challenger Ed Gallrein, a former Navy SEAL. Reports indicated the race was the most expensive U.S. House primary contest on record.
Andy Ogles of Tennessee, who has served in the House since 2023, lost the GOP primary for Tennessee's 5th Congressional District to former state Agriculture Commissioner Charlie Hatcher. Despite having Trump's endorsement, Ogles was defeated. Trump later endorsed Hatcher following the primary victory.
Seven incumbent House Democrats also lost their primaries. Shri Thanedar of Michigan, a House member since 2023, lost the Democratic primary for Michigan's 13th Congressional District to state Rep. Donavan McKinney. Thanedar had previously stated he was renouncing membership in the Democratic Socialists of America, though Detroit DSA leadership indicated he had been expelled prior to that announcement.
Dan Goldman of New York, who took office in 2023, lost the Democratic primary for New York's 10th Congressional District to former New York City Comptroller Brad Lander. Lander received an endorsement from New York City Mayor Zohran Mamdani, who described Lander as someone who would "bring principled leadership to Washington and make sure Congress works for the many, not just the few."
Adriano Espaillat of New York, a House member since 2017 and chair of the Congressional Hispanic Caucus, lost the Democratic primary for New York's 13th Congressional District to Darializa Avila Chevalier, who was also endorsed by Mamdani.
Diana DeGette of Colorado, who has served in the House for nearly two decades since 1997, lost the Democratic primary for Colorado's 1st Congressional District to Melat Kiros.
Al Green of Texas, a House member since 2005, lost the Democratic U.S. House primary runoff for Texas' 18th Congressional District to U.S. Rep. Christian Menefee.
Julie Johnson of Texas, who joined the House last year, lost the Democratic U.S. House primary runoff for Texas' 33rd Congressional District to former Rep. Colin Allred.
John Larson of Connecticut, serving in the House since 1999, lost the Democratic U.S. House primary in Connecticut's 1st Congressional District to former Hartford Mayor Luke Bronin.
Several of the incumbents faced challenges in districts impacted by redistricting, as was the case for the defeated Texas and Tennessee representatives.