Trump Endorsement Looms Over Texas Senate Republican Runoff/ Newslooks/ WASHINGTON/ J. Mansour/ Morning Edition/ Texas Republicans return to the polls Tuesday for a high-stakes Senate runoff between John Cornyn and Ken Paxton. The race has become a major loyalty test tied to Donald Trump and his influence over the Republican Party. The winner advances to face Democrat James Talarico in November’s general election.
Texas Senate GOP Runoff Quick Looks
- Texas Republicans vote Tuesday in a Senate runoff.
- John Cornyn faces Attorney General Ken Paxton.
- Trump endorsed Paxton on May 19.
- Democrats see a potential upset opportunity.
- Nearly 19 million Texans are registered to vote.
- Early voting turnout has already surpassed 621,000 GOP ballots.
- Rural pro-Trump counties may decide the race.
- Cornyn led the March primary but failed to avoid a runoff.
- The winner faces Democrat James Talarico in November.
- Texas voters will also decide multiple congressional runoffs.
Deep Look
Texas Republicans Head Into High-Stakes Senate Runoff
Texas Republicans will decide Tuesday whether longtime incumbent John Cornyn or Attorney General Ken Paxton becomes the party’s nominee for U.S. Senate.
The runoff has evolved into one of the country’s most closely watched Republican primary battles because of its connection to Donald Trump and the president’s continued effort to reshape the GOP around personal loyalty.
Trump’s Endorsement Changed the Race
Trump endorsed Paxton on May 19, giving the Texas attorney general a major boost during the final stretch of the campaign.
While Trump stopped short of harshly attacking Cornyn in the endorsement announcement, he emphasized that the senator “was not supportive” during difficult periods of Trump’s political career.
The endorsement turned the runoff into another test of Trump’s power within Republican primaries nationwide.
Cornyn Faces Strongest Political Threat in Years
Cornyn, seeking a fifth Senate term, finished first in the March primary but failed to secure enough support to avoid a runoff.
Historically, incumbent senators in Texas rarely lose primaries. According to the report, only two incumbent U.S. senators from Texas have lost a primary election in the last century.
Cornyn’s campaign has emphasized:
- Senate experience
- Conservative voting record
- Support for Trump priorities
- National security credentials
But Paxton has focused heavily on loyalty to Trump and criticism of Washington Republicans.
Rural Trump Counties Could Decide Outcome
The report highlights how voting patterns in heavily pro-Trump counties may ultimately determine the winner.
Paxton performed especially well in rural counties where Trump won more than 80% of the vote during the 2024 presidential election.
Although these counties are less populated, collectively they represented roughly one-fifth of Republican primary voters statewide.
Cornyn performed better in suburban and more moderate counties, particularly areas carried by Kamala Harris in 2024.
Democrats See Opening in Texas
The runoff is also drawing national attention because Democrats increasingly believe Texas could become competitive in the general election.
The eventual Republican nominee will face Democratic state Rep. James Talarico in November.
Midterm elections traditionally punish the president’s party, creating additional uncertainty for Republicans despite Texas remaining a GOP stronghold.
Massive Spending Defines Campaign
Advertising has dominated the runoff campaign.
Outside groups and campaign organizations have spent enormous sums attacking both candidates, particularly focusing on:
- Paxton’s ethical controversies
- Cornyn’s relationship with Trump
- Immigration policy
- Conservative credentials
The race has become one of the most expensive Senate primary battles in Texas history.
Key Election Details
- 8 p.m. ET across most of the state
- 9 p.m. ET in western Texas counties using Mountain Time
According to the report:
- Nearly 19 million Texans are registered to vote
- About 621,000 Republican ballots had already been cast early
- Roughly 63% of GOP primary votes were cast early in March
Counties are expected to release early and absentee results shortly after polls close Tuesday evening.
Other Important Texas Runoffs
Texas voters will also decide numerous congressional and statewide runoff contests Tuesday.
Among the most notable:
- Christian Menefee vs. Al Green
- Julie Johnson vs. Colin Allred
The contests follow congressional redistricting changes Republicans approved in 2025 to protect House control.
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