Senator John Cornyn of Texas faced a significant loss in the primary runoff against Ken Paxton, a challenger aligned with the MAGA movement. Losing by a margin of 28 percentage points, Cornyn’s defeat marks a historical low for sitting senators.
The outcome demonstrates the lingering unpopularity of established Republican figures in Washington among the party’s dedicated voters. President Trump’s core supporters remain influential in Republican primaries, evident in his ability to unseat incumbents he regards as disloyal.
Trump continues to secure primary victories this month despite declining overall popularity. This trend provides a more favorable midterm landscape for Democrats.
Despite outspending his opponent, Cornyn lost to Paxton in the most costly Senate primary to date. According to Decision Desk HQ, this was the worst performance for a sitting senator in a two-person primary or runoff since 1974.
Earlier, Senator Bill Cassidy of Louisiana, also opposed by Trump, failed to make the runoff in his re-election bid, garnering less than 25% of the vote in a four-candidate contest. These significant losses indicate how disconnected the party’s primary voters are from GOP leaders outside of Trump’s influence.
Trump’s impact also reached the House, where he aided in defeating Representative Thomas Massie of Kentucky in a primary on May 19. Trump acknowledged the difficulty of defeating incumbents on that day.
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