Cornyn vs. Paxton: The $100 Million Texas Senate Runoff

One week from today, on May 26, Texas Republican voters will decide the most consequential Senate runoff in a generation. Four-term incumbent John Cornyn faces Attorney General Ken Paxton in a race that has devolved into a scorched-earth spending war, a character assassination contest, and a test of whether the GOP can nominate a candidate capable of holding a seat that Democrats have not won since 1988 but now genuinely believe they can flip.

The stakes are not just Texan. They are national. Democrats need to flip four Senate seats to win the majority. If the Republican nominee emerges from the runoff too damaged, too broke, or too extreme to compete against Democratic nominee James Talarico, Texas moves from a safely Republican hold to a genuine battleground, and the math for Senate control changes overnight.

The Scorched Earth Campaign

The runoff has been almost entirely negative. Pro-Cornyn groups, led by Texans for a Conservative Majority, have spent millions attacking Paxton's character, highlighting his 2023 impeachment by the Texas House, alleged infidelity that led his wife to file for divorce on "biblical grounds," and his office's handling of child sex abuse cases. One ad, which cost $4.5 million to air, accuses Paxton of cutting a plea deal for a child trafficking defendant that resulted in no prison time and no sex offender registry listing.

Paxton's side has countered by framing Cornyn as insufficiently loyal to Trump and too closely tied to the Senate establishment. Paxton has leaned heavily into immigration, border security, and election integrity, issues that dominate among his base of non-college-educated Republican voters. Internal polling from the Paxton campaign claims an 11-point lead, though independent surveys show the race within the margin of error.

The Electability Question

This is where the national implications become sharpest. Cornyn's allies have argued throughout the primary that Paxton, if nominated, would alienate swing voters and potentially cost Republicans not just the Senate seat but down-ballot races across Texas. Texans for a Conservative Majority released data showing what they project as a down-ballot wipeout with Paxton leading the ticket.

The University of Houston poll found that likely runoff voters are evenly split, at 43% for both candidates, on who would be stronger against Talarico in November. But the underlying dynamics are more revealing: Cornyn leads among college-educated Republicans by 10 points, while Paxton leads among non-college voters by 17. Cornyn leads among independents who plan to vote in the GOP primary. Paxton dominates among voters whose primary concerns are immigration and election integrity rather than economic issues.

The Democrat in Waiting

James Talarico, a 33-year-old state representative, has already locked up the Democratic nomination and is running the kind of faith-and-populism campaign that Democrats believe can compete in Texas. He raised $20.7 million through Q1, has unified the state party behind him, and has begun general election messaging focused on affordability and kitchen-table economics.

With gas prices averaging $4.52 nationally and higher in parts of Texas, and with Trump's approval at historic lows, the Democratic path in Texas is narrow but no longer theoretical. A bruised, broke, or scandal-laden Republican nominee would make it wider.