Here are 12 Senate, House incumbents who’ve lost their primaries

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Today's Top Stories - August 13, 2026

Today's Top Stories - August 13, 2026

This year’s election cycle has seen a dozen congressional incumbents lose their primaries, with multiple contests remaining over the next month. 

In the upper chamber, Sens. Bill Cassidy (R-La.) and John Cornyn (R-Texas) lost their primaries earlier this year to challengers backed by President Trump. The two have since criticized Trump and administration officials from time to time, joining outgoing Sen. Thom Tillis (R-N.C.) in the “YOLO” caucus.

Over in the House, 10 incumbents have lost their primaries, with three Republicans going down and seven Democrats losing — in part due to challenges from the party’s left flank. 

Here are the congressional incumbents who have lost their primaries, so far. 

Sen. Bill Cassidy (R-La.)

Cassidy finished third in May’s GOP primary down on the Bayou, as Rep. Julia Letlow (R-La.) eventually secured the nomination via a runoff against state Treasurer John Fleming (R). 

The second-term lawmaker, one of seven Republican senators to vote to convict Trump at his second impeachment trial, has since bucked the president on the Iran war and his recent guidance regarding the childhood vaccine schedule. 

Sen. John Cornyn (R-Texas)

Despite Cornyn staunchly supporting Trump on the campaign trail, the president endorsed Texas Attorney General Ken Paxton (R) in the waning days of the GOP runoff. That foretold the end of the road for Cornyn, who has represented the Lone........

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