Ken Paxton Wins Texas Republican Senate Runoff, Defeating Longtime Sen. John Cornyn
Texas Attorney General Ken Paxton has defeated incumbent Sen. John Cornyn in the Republican Senate primary runoff, delivering a major political upset in one of the GOP’s highest-profile intraparty battles of the 2026 election cycle.
Multiple outlets reported the result Tuesday evening after polls closed in Texas. Cornyn had represented the state in the U.S. Senate since 2002 and entered the race with support from several establishment Republican figures.
Paxton campaigned as a more combative conservative candidate and positioned himself closer to the populist wing of the Republican Party that has gained influence in recent election cycles. The runoff became a high-stakes test of whether longtime institutional Republicans could still hold statewide power in Texas against insurgent conservative challengers.
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The result is likely to have implications beyond Texas.
Cornyn was viewed as a senior Republican voice in Washington with longstanding ties inside Senate leadership circles. Paxton’s victory may strengthen arguments within the GOP that Republican primary voters continue favoring candidates who run against the party establishment rather than within it.
The race also drew national attention because of Paxton’s polarizing political profile and history of legal and political controversies during his tenure as attorney general.
The final certified vote totals and official campaign responses were not immediately available at publication time.
The general election matchup is expected to draw significant national attention as Republicans work to maintain Senate momentum heading deeper into the 2026 cycle.
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