US elections: Meet 12 Senate, House incumbents who saw their 2026 re-election bids end in primary defeat

In the upper chamber, Sens. Bill Cassidy (R-La.) and John Cornyn (R-Texas) lost their primaries earlier this year. In the House, 10 incumbents lost their primaries, with three Republicans going down and seven Democrats losing — in part due to challenges from the party’s left flank.