Record number of congressional incumbents lose primaries in 2026 midterm cycle, spanning both parties
Twelve House members and two senators have been defeated in their 2026 primary bids for renomination, according to the Center for Politics at the University of Virginia. The University of Virginia's Kyle Kondik described the total as "one of the highest numbers in decades in a non-redistricting year." Losses span both parties and reflect a range of factors including candidate scandals, Trump's interventions in GOP primaries, Democratic redistricting efforts, and challenges from the Democratic Socialists of America.
The 2026 midterm primary cycle has produced an unusually high number of congressional incumbent defeats, with 12 House members and two senators losing renomination bids before election day. The University of Virginia's Center for Politics noted that historically only redistricting years — those ending in "2" — have produced comparable numbers; this year's total stands out in a cycle with only partial redistricting activity.
On the Democratic side, a cluster of incumbents who built their public profiles during the Trump resistance of 2017–2021 were defeated by younger challengers, many affiliated with the Democratic Socialists of America. Reps. Diana DeGette of Colorado, Shri Thanedar of Michigan, and Al Green of Texas were ousted by DSA-aligned challengers. Rep. Dan Goldman of New York lost to former New York City Comptroller Brad Lander, who was backed by socialist New York City Mayor Zohran Mamdani. Rep. Adriano Espaillat of New York, chair of the Congressional Hispanic Caucus, was defeated by DSA member Darializa Avila Chevalier, also backed by Mamdani. Age was a noted factor in several races, with younger challengers defeating incumbents in their late 60s and 70s.
Also on the Democratic side, retired Lt. Col. Alexander Vindman — who testified during the 2019 House impeachment inquiry and built his Senate campaign in Florida around accountability themes — lost his primary to democratic socialist Angie Nixon. Politico reported that Democratic strategist David Axelrod attributed Nixon's victory to her focus on cost-of-living issues, while Vindman's resistance credentials had faded in salience. A Democratic operative, speaking anonymously, described the "institutionalist" resistance candidates as offering a "prescription" that voters were no longer seeking, given eroded faith in institutions.