TRUMP’s Endorsement Obliterates Texas Establishment

Houston city flag waving in front of other flags

Texas conservatives sent a thunderous message to Washington when Trump-backed Attorney General Ken Paxton crushed four-term incumbent Senator John Cornyn by more than 30 points in the Republican Senate primary runoff, making clear that the MAGA base — not the establishment — now controls the direction of the Texas GOP.

Story Highlights

Ken Paxton defeated incumbent Sen. John Cornyn by over 30 points in the Texas Republican Senate primary runoff, securing the GOP nomination.
President Trump endorsed Paxton days before the runoff, and multiple networks credited the endorsement as a decisive factor in flipping counties that had previously favored Cornyn.
Paxton’s victory speech focused on border security, opposing gender-transition procedures for minors, and fighting big tech — core MAGA priorities.
Turnout was approximately 8% of registered voters, a low-participation environment that typically amplifies the most ideologically motivated segment of the base.

A Dramatic Reversal Inside the Texas GOP

Cornyn failed to clear 50% in the March primary, forcing a runoff against Paxton. Once Trump announced his endorsement, the race shifted rapidly. The Associated Press called the contest shortly after polls closed on May 27, describing Paxton’s win as “resounding.” NBC News analyst Steve Kornacki reported early returns showing Paxton “absolutely crushing Cornyn,” calling the outcome a “dramatic reversal” from the March primary results, where Cornyn had led.

CBS News, which also projected Paxton’s win, noted that many counties that had favored Cornyn in the earlier primary flipped to Paxton in the runoff. The network pointed directly to “the power of Donald Trump’s endorsement” as the driving force behind those county-level shifts. The margin — over 30 points — was not a close call. It was a statement about which direction Texas Republican voters want their party to go.

Paxton’s Message: Border, Family, and Fighting Back

In his victory speech, Paxton made clear what his Senate candidacy will stand for. He pledged to fight “big tech,” citing active lawsuits against Netflix, Snapchat, and Roblox. He criticized Democrats for “open borders” and what he called “gender mutilation surgery on kids.” He also vowed to support the military against threats from China. These are not vague talking points — they represent the core conservative agenda that grassroots Republican voters have been demanding from their elected officials.

Paxton also directly credited Trump for standing firm when pressure mounted. “When everyone in Washington told him to abandon me and abandon the people of Texas, he didn’t listen,” Paxton said. That line resonated with a base that has long felt betrayed by establishment Republicans who talk conservative but govern like moderates. Cornyn, despite decades in Washington and a reputation as a dealmaker, could not overcome the perception that he had drifted from the values of Texas conservatives.

Establishment Warnings vs. Base Priorities

Cornyn and his allies warned that Paxton’s nomination could “risk everything” the incumbent had built and potentially endanger the Senate seat. Cornyn had spent considerable time attacking Paxton as “legally and ethically compromised.” Those warnings reflect real concerns that will play out in the general election. However, the runoff electorate — roughly 60% of whom, according to the Associated Press, wanted change — rejected that argument decisively.

President Trump-backed Texas AG Ken Paxton defeated incumbent John Cornyn by more than 30 points in a high-stakes runoff for the Republican nomination for U.S. Senate in the state. @jayobtv reports. pic.twitter.com/wd8wyE2qgK

— Good Morning America (@GMA) May 27, 2026

The low turnout of approximately 8% of registered voters means the result reflects the most engaged and ideologically committed slice of the Texas Republican Party. Critics will argue that slice does not represent the full GOP coalition. But those same engaged voters are the engine of conservative grassroots politics. They showed up, they chose Paxton, and they did so by a landslide. The general election will test whether Paxton’s MAGA-first platform can hold a seat that Republicans cannot afford to lose. The base has spoken — now the campaign begins in earnest.