President Donald Trump has stepped into one of the most-watched Republican races in Texas, and his choice is now clear: Ken Paxton.
On May 19, 2026, Trump endorsed Texas Attorney General Ken Paxton in the Republican runoff for U.S. Senate, giving Paxton a major boost in his race against longtime Senator John Cornyn. The timing matters. Early voting is already underway, and the runoff is set for May 26, 2026.
A Late Endorsement With Big Weight
Trump’s endorsement came after weeks of pressure and public waiting. Both Paxton and Cornyn had worked to show strong support for Trump and his agenda, but Trump finally sided with Paxton.
In his Truth Social post, Trump praised Paxton as a loyal supporter and called him an “America First Patriot.” He also pointed to Paxton’s support for ending the Senate filibuster and backing the SAVE Act.
This is not a small move inside the Republican Party. Cornyn is an incumbent senator with decades in Washington. Paxton is trying to unseat him from the right, arguing that Texas needs a stronger fighter in the Senate.
Why Paxton Won Trump’s Backing
Paxton has built much of his Senate campaign around loyalty to Trump’s political movement. That message appears to have worked.
Trump said Paxton had been loyal to him and to the MAGA movement. That was one of the clearest reasons given for the endorsement.
Paxton has also backed issues that Trump has been pushing hard, including changes to Senate rules. In the final stretch of the runoff, those issues became part of the public fight between Paxton and Cornyn.
For Paxton, the endorsement gives his campaign a powerful closing argument. He can now tell Republican voters that Trump has made his pick before they cast their final ballots.
What This Means for John Cornyn
Cornyn is now facing a difficult final week.
He entered the race as the sitting senator, but the runoff showed that holding office was not enough to end the fight early. Neither Cornyn nor Paxton won a majority in the March 3 primary, which forced the May 26 runoff.
Cornyn has tried to present himself as a reliable conservative who can win in November. His supporters have also argued that he would be the stronger general election candidate.
Trump’s endorsement cuts against that message. It gives Paxton a fresh burst of attention and puts Cornyn in the position of defending himself against both his challenger and the party’s most powerful figure.
The Runoff Is Now Even Sharper
The Texas Senate race was already intense, but Trump’s move makes it sharper.
Republican voters now have a clear signal from Trump before the final vote. That does not guarantee the result, but it can shape late momentum, especially in a runoff where turnout can be lower than in a regular primary.
The winner of the Republican runoff is expected to face Democrat James Talarico in the general election. Reuters reported that the race is being closely watched because control of the Senate is a major issue in the 2026 midterms.
Paxton’s Boost Comes With Scrutiny
The endorsement is a major gain for Paxton, but it does not erase the questions around him.
Paxton was impeached by the Texas House in 2023 and later acquitted by the Texas Senate. He has also faced legal and ethical controversies that remain part of the political debate around his campaign.
That is why some Republicans have worried about whether Paxton would be the safer choice in a general election. Still, Trump’s endorsement shows that loyalty and alignment with his agenda carried more weight in this runoff decision.
The Final Days Matter Most
With the runoff set for May 26, the next few days are now critical.
Paxton gets the advantage of Trump’s name at the exact moment many voters are making their final choice. Cornyn still has his record, his campaign structure, and his case that experience matters.
But the headline has changed. The Texas Senate runoff is no longer only Paxton versus Cornyn. It is also a test of how much Trump’s endorsement can move Republican voters in a high-stakes race.
