10 US House incumbent lawmakers have lost 2026 primaries so far

Key Points:

• Ten incumbent U.S. House lawmakers, including three Republicans and seven Democrats, have lost their primaries so far in the 2026 election season, with redistricting affecting some races in Texas and Tennessee.
• Republican incumbents Dan Crenshaw (TX), Thomas Massie (KY), and Andy Ogles (TN) were defeated in their primaries, with Massie's loss marking the most expensive House primary contest ever.
• Several Democratic incumbents lost to progressive or Democratic socialist challengers, including Shri Thanedar (MI), Dan Goldman (NY), Adriano Espaillat (NY), Diana DeGette (CO), Al Green (TX), Julie Johnson (TX), and John Larson (CT).
• Endorsements from figures like Donald Trump and progressive leaders such as Zohran Mamdani played significant roles in these primary outcomes.
• Many defeated incumbents have served multiple terms, with some, like Diana DeGette and John Larson, holding office for over two decades before losing their primaries.