In a brutal repudiation of the GOP old guard, Texas Attorney General Ken Paxton crushed four-term incumbent Sen. John Cornyn in the Republican Senate runoff Tuesday night, winning by a commanding margin of roughly 63% to 37%.
The victory marks one of the biggest primary upsets in modern Texas political history. Cornyn, a powerful Senate insider and former Majority Whip, was unceremoniously dumped by his own party’s voters after more than two decades in Washington.
Paxton, the hard-charging conservative known for his fierce battles with the Biden administration and loyalty to Donald Trump, declared victory and wasted no time thanking the base.
“Texas has spoken loud and clear,” Paxton said in his victory speech. “We’re done with business as usual.”
Ken Paxton just kicked off his victory speech after defeating John Cornyn with a monumental line that will be remembered for decades.
PAXTON: “Wow. To the people in this room, to the people watching at home and to the people of the great state of Texas, tonight we just made… pic.twitter.com/MgFevD3pe7
— Overton (@overton_news) May 27, 2026
The race turned decisively after Trump endorsed Paxton just days before early voting ended. That seal of approval from the former president mobilized the MAGA base and proved once again that Trump remains the undisputed kingmaker in Republican primaries.
How It All Unfolded
Cornyn led the initial March 3 primary with about 42% of the vote, but failed to clear 50%, forcing a runoff against Paxton, who took 41%. The contest quickly turned into a bloodbath, with both sides dumping tens of millions into attack ads.
Paxton hammered Cornyn as out-of-touch with Texas values and too cozy with the Washington establishment. Cornyn fired back, portraying Paxton as ethically compromised and a liability heading into the general election.
But in the end, Texas Republicans chose the fighter over the dealmaker.
Other Key Results
The Paxton-Cornyn showdown wasn’t the only fireworks in Texas Tuesday night.
In the race to replace Paxton as Attorney General, conservative state Sen. Mayes Middleton defeated U.S. Rep. Chip Roy, setting up a strong favorite to hold the powerful post in November.
Democrats also saw some action, with state Rep. James Talarico emerging as their Senate nominee. He’ll now face the daunting task of trying to flip deep-red Texas in November against the polarizing Paxton.
What It Means
Paxton’s win is the latest sign that the Republican Party continues its sharp rightward shift. Traditional, institutional conservatives like Cornyn are increasingly being shown the door in favor of Trump-aligned warriors willing to fight the culture wars and challenge the status quo.
For national Republicans, the result is a double-edged sword. While the seat remains heavily favored to stay red in November, Paxton’s baggage and combative style could force the party to spend serious cash defending what should have been a safe hold.
Democrats are already licking their chops, viewing Paxton as far more beatable than the polished Cornyn. But in a state that hasn’t elected a statewide Democrat in nearly 30 years, their path to victory remains steep.