Trump’s Paxton Gamble: Why the Texas Endorsement Could Cost Republicans the Senate

The most expensive Senate primary in American history reaches its climax Monday. Trump chose loyalty over electability — and Democrats are watching with barely concealed glee.

On the afternoon of May 19 — as votes were still being cast in six states — Donald Trump posted to Truth Social and detonated the Texas Senate race. “Ken is a true MAGA Warrior who has ALWAYS delivered for Texas, and will continue to do so in the United States Senate,” the president wrote. Of John Cornyn, the four-term Republican incumbent who has served in the Senate since 2002, Trump was colder: “John Cornyn is a good man, and I worked well with him, but he was not supportive of me when times were tough.”

Senate Republican leaders had lobbied Trump for months — months — to back Cornyn. Their argument was simple and, by conventional political logic, airtight: Paxton carries more baggage than a Samsonite factory. A securities fraud indictment (settled via pre-trial diversion in 2024). An impeachment by his own party’s state House on 20 articles (acquitted by the state Senate). An FBI investigation (declined for prosecution). A divorce filed by his wife on “biblical grounds.” A general election opponent, Democrat James Talarico, who is already polling within striking distance against both Republicans.

Trump chose Paxton anyway.

The Numbers

The most recent independent poll — from the University of Houston’s Hobby School of Public Affairs, fielded April 28 to May 1 — tells the story in two data points:

That poll was conducted before Trump’s endorsement. The conventional wisdom — supported by data from every other 2026 primary where Trump has intervened — is that Trump’s backing is worth 5 to 15 points in a Republican primary electorate. Among Wesley Hunt’s March primary voters (13.5% of the total), 54% now favor Paxton versus 35% for Cornyn. Paxton is retaining 95% of his March voters; Cornyn is retaining 91%.

The math is simple. Unless something extraordinary happens between now and Monday, Ken Paxton will be the Republican nominee for U.S. Senate in Texas.

Why This Matters for Senate Control

Here is where the story gets consequential. Republicans hold the Senate 53–47. Democrats need a net gain of four seats for a working majority. The consensus top targets are Maine, North Carolina, Georgia, and Ohio — all states where Democrats either lead or are competitive in current polling. If Democrats sweep those four, they’re at 51.

Texas was never supposed to be on the map. It was supposed to be the one safe backstop — the state where Republicans could absorb a national wave and still hold. John Cornyn, a former state Supreme Court justice with $11.2 million in the bank and 24 years of constituent service, was supposed to be the firewall.

Ken Paxton is not a firewall. Ken Paxton is a liability.

The Talarico Factor

State Rep. James Talarico is not the kind of Democrat Texas Republicans were prepared to face. He’s 33, telegenic, a former public school teacher, and he won the March primary outright by defeating Rep. Jasmine Crockett. He has been running a disciplined general election campaign since March — three months of free visibility while Republicans spent $125 million tearing each other apart.

Early general election polling is sparse but real. A Hill/Emerson survey conducted as early voting opened found both Cornyn and Paxton in a statistical tie with Talarico. That alone should terrify the GOP. Texas hasn’t elected a Democratic senator since Lloyd Bentsen in 1988, but the margin has been narrowing: Ted Cruz won by just 2.6 points in 2018.

The difference is the denominator of undecideds — and what Paxton’s baggage does to them. In a Cornyn vs. Talarico race, undecideds break roughly evenly. In a Paxton vs. Talarico race, internal Democratic polling (take with salt) suggests undecideds break 2:1 for Talarico when informed of Paxton’s legal history.

The Money Funeral

The Texas Senate primary has consumed over $125 million in ad spending, according to AdImpact — making it the most expensive primary of any kind in American history. For context:

Cornyn has outspent Paxton roughly 4-to-1 on runoff advertising alone, burning through resources that would otherwise fund his general election defense. The Lone Star Freedom Project, a satellite group backing Cornyn, has spent $18 million. Every dollar spent persuading Republican primary voters to choose Cornyn over Paxton is a dollar that cannot be spent persuading general election voters to choose any Republican over Talarico.

And if Paxton wins — which appears increasingly likely — he inherits a campaign apparatus that is depleted, divided, and defending a nominee whose most prominent credential is his rap sheet.

The National Environment

Even a clean Republican nominee would face headwinds in November 2026. The national environment is bleak for the president’s party:

The president’s party has lost House seats in 18 of the last 20 midterms. When a president’s approval is below 40% heading into a midterm, the losses are typically catastrophic. George W. Bush was at 38% approval in November 2006 when Republicans lost 30 House seats and 6 Senate seats.

Trump is at 31–39% depending on the pollster, with independent approval at 25%. The Iran war remains deeply unpopular (65% disapprove of Trump’s handling). And the candidate he just endorsed in the nation’s second-largest state has been indicted, impeached, investigated by the FBI, and divorced.

The Timeline of a Trainwreck

What Happens Next

Two scenarios:

In both scenarios, Republicans lose. The question is how much. In Scenario A, they may lose the seat. In Scenario B, they hold the seat but spend tens of millions defending it — money diverted from genuine battlegrounds.

This is the Paxton gamble. Trump chose loyalty. The bill comes due Monday — and then again in November.

The Bottom Line

The Texas Senate race was supposed to be background noise — a safe Republican seat in a deep-red state. Instead, it has become the most expensive, most chaotic, and potentially most consequential primary in the country. If Paxton wins Monday and loses in November, it will be the clearest case study in a generation of how a president’s revenge instinct can override his party’s survival instinct.

Democrats need four Senate seats to flip control. Maine looks good. North Carolina looks good. Georgia looks good. Ohio is a coin flip. If Texas becomes a real race, Democrats don’t need Ohio anymore.

That’s the gamble. That’s the stakes. And Trump already placed the bet.