Trump-Backed Ken Paxton Defeats Incumbent John Cornyn in Texas Senate Primary
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Texas Attorney General Ken Paxton defeated four-term U.S. Senator John Cornyn in a Republican primary runoff on May 26, 2026. Paxton, who received a last-minute endorsement from former President Donald Trump, will now face Democratic state Representative James Talarico in the November general election. The race, which saw over $108 million in spending, signals Trump's continued influence within the Republican Party.
Facts First
- Texas Attorney General Ken Paxton defeated incumbent Senator John Cornyn in the Republican primary runoff.
- Former President Donald Trump endorsed Paxton a week before the election, calling him a 'true MAGA Warrior'.
- The primary became the most expensive Senate race in history, with over $108 million spent, largely by Cornyn's side.
- Paxton will face Democratic nominee James Talarico in the November general election for the Texas Senate seat.
- The result is part of a pattern of Trump-backed challengers defeating incumbent Republicans in recent primaries in Indiana, Louisiana, and Kentucky.
What Happened
On Tuesday, May 26, 2026, Texas Attorney General Ken Paxton defeated four-term U.S. Senator John Cornyn in a Republican primary runoff. The Associated Press called the race for Paxton one hour after polls closed, with Paxton holding a commanding lead. The contest was the most expensive Senate primary in history, with over $108 million spent, much of it by Cornyn's campaign and allied groups. Former President Donald Trump endorsed Paxton on May 19, 2026, during early voting. The winner of the Republican runoff will face Democratic state Representative James Talarico in the November general election.
Why this Matters to You
This primary outcome may signal a shift in the political landscape, potentially affecting the types of policies and candidates that gain prominence in your state and nationally. The general election in November will determine who represents Texas in the U.S. Senate, influencing federal legislation on issues from the economy to national security. The high spending in this primary also highlights the significant financial resources directed toward influencing electoral outcomes, which could shape the political environment for future races.
What's Next
Ken Paxton will now campaign against Democrat James Talarico in the lead-up to the November 2026 general election. The Cook Political Report has changed its rating for the Texas Senate race from 'Likely Republican' to 'Lean Republican' following the primary results. The National Republican Senatorial Committee (NRSC) did not mention Paxton in its post-primary statement, and Senate Majority Leader John Thune reportedly spoke with Paxton after the victory, which may indicate efforts to unify the party. Republicans are forecast to win 3-5 House seats in Texas in the upcoming election.