Ken Paxton Just Ended John Cornyn’s Career. Texas Sent a 25-Point Message to Washington.

AUSTIN, May 27, 2026 —

Ken Paxton, the Texas attorney general who was impeached by his own party’s supermajority in the state House of Representatives, acquitted by a Republican Senate that chose not to convict him, indicted on federal securities fraud charges that were later dropped, and endorsed by President Donald Trump seven days before this election — defeated incumbent Senator John Cornyn on Tuesday night in the Republican primary runoff by more than 25 percentage points.

Paxton received 63.8% of more than 1.38 million votes cast. Cornyn, a four-term senator and the former Senate Majority Leader, received roughly 36%. The Associated Press called the race the moment the last polls closed. John Cornyn becomes the first incumbent Republican senator from Texas to lose a primary since Lloyd Bentsen beat Ralph Yarborough in 1970 — a span of 56 years.

It was not close.

What Happened in the Final Week That Decided Everything

The race had been competitive from the moment Cornyn failed to clear 50% in the March primary — finishing at 41.9% to Paxton’s 40.8%, with Congressman Wesley Hunt drawing 13.5% in a three-way field. A runoff was always coming. What neither campaign knew was whether Trump would stay neutral or intervene.

He did not stay neutral. Seven days before Tuesday’s election, Trump formally endorsed Paxton on Truth Social, calling him a fighter who had been treated very unfairly and praising his record as the most aggressive conservative attorney general in the country. Hunt, who finished third in March, endorsed Paxton the same week.

The timing was surgical. The endorsement arrived early enough to maximize voter mobilization in the final days but close enough to the election that Cornyn had no time to adjust his strategy or his message. The margin on Tuesday — 25-plus points — was larger than any poll had projected and larger than any prediction of Trump’s impact on the race had suggested. Cornyn had outraised Paxton significantly. He spent more money. He had the institutional endorsements, the business community, and the establishment infrastructure of the Texas Republican Party behind him.

None of it produced a vote margin remotely close to the gap Trump’s endorsement opened.

Who Paxton Is — and Why His Victory Is Historically Remarkable

Ken Paxton was first elected Texas attorney general in 2014. He has never been a conventional figure. Within a year of taking office, he was indicted by a grand jury on state securities fraud charges — a case that has wound through the Texas courts for over a decade and has not yet produced a trial. In 2023, the Texas House of Representatives voted 121-23 to impeach him on charges including bribery, abuse of office, and obstruction of justice — the most lopsided impeachment vote in the state’s history. The Texas Senate acquitted him on all charges in September 2023, and he returned to office.

He resumed filing lawsuits against the federal government and built one of the most prolific records of legal confrontation with Democratic administrations of any attorney general in the country. He filed 17 lawsuits against the Biden administration across his tenure. He became the attorney general whom conservative legal organizations called first when they wanted a named plaintiff for a high-stakes constitutional challenge.

His victory on Tuesday makes him the first primary challenger to defeat an incumbent U.S. senator from Texas since 1970. In the current political environment, the combination of Trump’s endorsement and Paxton’s image as a fighter who survived every attempt to destroy him produced a result that political analysts will study as a case study in how Trump’s endorsement power operates at its maximum effect.

Paxton in his victory speech told a crowd in Plano: Tonight we just sent a Texas-sized message to Washington. I said it in March and I’ll say it again now. Today, change was on the ballot. Change won.

What Cornyn Said — and What It Means for the Senate

Cornyn spoke at a watch party at the JW Marriott in downtown Austin. He told the assembled crowd that he had said throughout the race that he trusted the voters of Texas and that they had made their decision and he must respect it. He pledged to support the Republican ticket — meaning Paxton in November against Democrat James Talarico.

That concession carries institutional weight. Cornyn is not just a senator. He is a former Senate Majority Leader, a former whip, and one of the most significant legislative architects of the Republican caucus over the past two decades. Losing him is not a symbolic loss for the institutional wing of the party. It removes a working part of the Senate’s Republican machinery.

Cornyn’s relationship with Trump had been fractious in specific, documented ways. He criticized Trump’s language around the January 6 riot as reckless. He was booed at a Texas GOP convention in 2022 for helping negotiate a bipartisan gun safety bill. Trump called him a RINO — a Republican in name only — on Truth Social as recently as 2023 and predicted then that he would lose his next reelection campaign. Tuesday proved that prediction correct.

The Pattern That Now Defines the Republican Party

Paxton’s win is the third major Trump-backed primary victory over an established Republican incumbent in the past two weeks. Bill Cassidy fell in Louisiana on May 16. Thomas Massie fell in Kentucky on May 20. Cornyn fell in Texas on May 26.

Three senators or representatives — all with long careers, all with strong ideological conservative records, all with institutional backing and fundraising advantages — fell to Trump-backed challengers in a ten-day window. The common thread is not ideological. Cassidy voted to convict Trump in the 2021 impeachment. Massie was a libertarian dissenter on spending and executive authority. Cornyn drew Trump’s ire for procedural institutionalism and a handful of bipartisan votes over 24 years.

What the three results share is the demonstration that Trump’s endorsement in a Republican primary is worth more than incumbency, more than fundraising, more than institutional support, and more than a 24-year Senate career. The message to the 53 Republican senators currently navigating the One Big Beautiful Bill debate, the Iran deal framework, and every subsequent legislative fight of the second term is the same one Louisiana, Kentucky, and Texas delivered in sequence: there is no seniority bonus in this party. There is alignment or there is a Paxton.

November and What Comes After

Paxton faces Democrat James Talarico in November — an Austin-area state representative and former public school teacher who defeated Congresswoman Jasmine Crockett in the Democratic primary. Texas has not sent a Democrat to the Senate since 1988. Talarico is widely considered a significant underdog in a state that voted for Trump by more than 30 points in 2024.

But Paxton’s legal history — the unresolved state securities case that has been pending for over a decade, the impeachment that produced a 121-23 bipartisan vote — gives Talarico a set of biographical attack lines that no Democratic Senate candidate in Texas has had available since the era when the state was genuinely competitive.

Steve Bannon, Trump’s former chief strategist, said Tuesday night that Paxton beating Talarico in November will be very tough. That assessment, coming from one of Trump’s closest political allies, is the most honest appraisal of where the general election stands heading into a summer campaign that is already unlike anything the Texas political landscape has produced in a generation.