Texas Senate Showdown Pits Paxton Against Cornyn After Trump Backs the Challenger
CNBC reported Tuesday that Texas Republican voters headed to the polls for a Senate primary runoff pitting four-term incumbent Sen. John Cornyn against state Attorney General Ken Paxton, who last week secured a high-profile endorsement from President Donald Trump.
The winner advances to face Democratic state legislator James Talarico in November’s general election.
A Bombshell Endorsement Reshapes the Texas Senate Primary
Trump’s backing of Paxton rattled Senate Republicans, who have directed substantial funding toward protecting Cornyn’s seat. The endorsement arrived despite Cornyn’s own efforts to repair what insiders describe as a long-strained relationship with the president.
On his Truth Social platform, Trump wrote that Cornyn had not stood by him “when times were tough.” He praised Paxton as a fighter who knows “how to WIN,” framing loyalty as his central criterion.
A Quantus Insights survey released the day before voting showed Paxton ahead by more than nine percentage points, making him the clear frontrunner heading into the runoff.
Background: A Messy Primary Cycle and Paxton’s Troubled Record
Cornyn led Paxton in the March primary but fell short of the threshold needed to avoid a runoff, setting the stage for Tuesday’s contest.
Paxton’s tenure as Texas’s top law enforcement officer has been shadowed by serious controversy. He was impeached by the Texas House, acquitted by the state Senate, and separately indicted on securities fraud charges. His marriage also recently ended in a high-profile divorce.
Cornyn’s campaign leaned hard into that record. Republican Senate leadership has privately argued that Cornyn would be a stronger and less costly general-election candidate against Talarico than Paxton would be.
Trump’s Pattern of Purging GOP Dissenters
The Texas race fits a broader pattern in Trump’s second term. He has systematically targeted Republican officeholders he views as insufficiently loyal. Sen. Bill Cassidy of Louisiana was blocked from reaching a runoff after Trump backed his opponent. Rep. Thomas Massie of Kentucky, a recurring Trump critic, lost his primary to a Trump-aligned challenger named Ed Gallrein.
Senate Republicans now watch Texas closely. A Paxton win would confirm that a Trump endorsement can topple even well-resourced incumbents. A Cornyn victory would signal that institutional support and a strong fundraising base can still withstand presidential pressure.
With control of the Senate factored into the November calculus, the cost and outcome of this race carry weight well beyond Texas borders.
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