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Cornyn, Paxton Tied in Texas GOP Senate Primary, Poll Finds

A public survey after heavy pro-Cornyn ad buys reveals a toss-up poised to pivot on President Trump’s endorsement

Overview

  • An Emerson College poll of Republican primary voters conducted Aug. 11–12 shows Sen. John Cornyn at 30%, Attorney General Ken Paxton at 29% and 37% undecided within a 4.4-point margin of error.
  • Pro-Cornyn super PAC Texans for a Conservative Majority has invested over $3 million in advertising, and Senate Leadership Fund backers project up to $75 million more could be required to shore up Cornyn’s campaign.
  • Emerson executive director Spencer Kimball notes that 73% job approval for Trump among undecided primary voters makes his endorsement a potential swing factor in the tight contest.
  • Texas election rules mandate that any candidate failing to secure a majority on March 3, 2026, advances with the runner-up to a May runoff, heightening the stakes for undecided voters.
  • Both Republicans currently outperform Democrat Colin Allred in hypothetical general-election matchups, though Paxton’s legal controversies could demand extra GOP resources for a 2026 defense.