Cornyn Falls, Paxton Rises: Inside the Texas Primary That Could Reshape the Senate

On the night of May 26, 2026, John Cornyn — a four-term senator, former Senate Majority Whip, and two-decade fixture of Texas Republican politics — lost his party's nomination by 28 points to a man the National Republican Senatorial Committee had spent months attacking as incompetent, dishonest, and unelectable [1]. Within hours, the NRSC deleted at least four press releases criticizing Ken Paxton from its website and pledged to support him in November [2].

The whiplash captures a Republican Party caught between two imperatives: loyalty to Donald Trump, whose endorsement one week before the runoff transformed the race, and anxiety that Paxton's legal and ethical baggage could turn a safe Senate seat into a genuine contest — at a moment when the GOP can afford to lose almost nothing.

The Numbers: A Historic Blowout

In the initial March 3 primary, Cornyn led Paxton by just 1.2 percentage points — 41.9% to 40.7% — with businessman Don Hunt taking 13.5% [3]. That narrow gap sent the race to a runoff. But Trump's May 19 endorsement, in which he called Paxton "a true MAGA warrior," collapsed the margin entirely [4]. Paxton won the May 26 runoff with approximately 64% of the vote to Cornyn's 36% [1][3].

Source: Texas Secretary of State / Texas Tribune

Data as of May 27, 2026CSV

Cornyn became the first Republican senator from Texas ever to lose a primary, and the first incumbent Texas senator of either party to be denied renomination since 1970 [5][6]. The scale of the defeat — a 28-point swing from a near-tie — underscores how potently a Trump endorsement can mobilize the Republican primary electorate even in a state where the incumbent had deep institutional support and an overwhelming financial advantage.

The Money Gap That Didn't Matter

The Texas Senate primary became the most expensive in American history, and Cornyn's side dominated the spending. Three outside groups — Texans for a Conservative Majority ($23.3 million), Lone Star Freedom Project ($17.8 million), and the dark-money organization One Nation ($10.9 million) — drove the bulk of Cornyn's advertising advantage [7]. Cornyn's campaign and allied super PACs spent more than $21 million on ads between the March primary and the May runoff alone [7].

Paxton was outspent roughly three to one. His primary outside support came from the Lone Star Liberty PAC, which raised $3.9 million in total. Major donors included Gary Heavin, the Waco-area founder of the Curves fitness franchise. Three LLCs — Two Toads LLC, SSC Inc., and Baloney Feathers LTD — each contributed $100,000 on the same date, all registered to the same post office box in Lubbock; the individuals behind those entities have not been publicly disclosed [7].

Cornyn's allies had warned that Paxton's weak fundraising infrastructure would force the national party to spend upward of $100 million defending Texas in the general election — resources they argued should go to genuine swing states like Georgia, Michigan, and North Carolina [8].

Paxton's Legal Record: The Vulnerabilities

Paxton arrives at the general election carrying a decade of legal and ethical controversies that Republicans themselves have catalogued in detail.

Securities fraud charges (2015): A state grand jury indicted Paxton on two counts of securities fraud (first-degree felonies) and one count of failing to register with state securities regulators, stemming from his solicitation of investors in Servergy Inc. in 2011. In 2024, Paxton agreed to pay nearly $300,000 in restitution under a deal that ended the criminal case [9][10].

FBI investigation (2020): Eight senior aides in Paxton's office reported him to the FBI, accusing him of bribery and abusing his office to benefit Nate Paul, a political donor and real estate investor who also employed a woman with whom Paxton acknowledged an extramarital affair. The investigation moved from Texas federal prosecutors to the Justice Department in Washington, D.C. In the final weeks of the Biden administration, DOJ officials quietly declined to prosecute [9][11].

Impeachment (2023): The Republican-controlled Texas House impeached Paxton by a vote of 121–23, with articles alleging preferential treatment to a donor, misuse of public resources, false statements against whistleblowers, and obstruction of the securities fraud case. The Texas Senate acquitted him 16–14 in September 2023 [9][10].

Whistleblower judgment (2025): A judge ordered Paxton to pay $6.6 million to the fired attorneys who had reported him to the FBI [9].

The now-deleted NRSC press releases criticized Paxton for additional issues: declaring three Texas homes as primary residences (potential mortgage fraud), using taxpayer dollars to buy hotel rooms for campaign donors, and delinquent tax payments [2].

Republican strategists have identified the combination of the extramarital affair, the impeachment, and the securities fraud settlement as the most damaging attack vectors in a general election, particularly among suburban women and college-educated voters [8][12].

The General Election Landscape

The Cook Political Report shifted its rating of the Texas Senate race from "Likely Republican" to "Lean Republican" within hours of Paxton's victory [12]. The rating change reflected the Cook analysts' assessment that Paxton "has a litany of ethical lapses for Democrats to exploit — from allegations of bribery and misuse of his office to marital infidelity" [12].

Polling conducted before the runoff already showed warning signs for Republicans. A UT/Texas Politics Project poll from late April found Democratic nominee James Talarico, a state representative from Austin, leading Paxton by 8 points (42% to 34%) and Cornyn by 3 points (44% to 41%) [13]. Talarico held a net positive favorability rating of +10 points, while Paxton's favorability was net -9 [13].

Source: UT/Texas Politics Project Poll

Data as of Apr 28, 2026CSV

Talarico also holds a fundraising advantage over Paxton heading into the general election [12]. Democrats have not won a statewide race in Texas since 1994 and have not won a Senate seat since 1988, so any Democratic path to victory remains steep [12]. But Republican operatives acknowledge that Paxton's nomination makes the race meaningfully more competitive than it would have been with Cornyn atop the ticket.

The Senate Map: Why One Seat Matters

Republicans hold a 53-47 Senate majority. Of the 35 seats contested in 2026 (including special elections in Florida and Ohio), Republicans must defend 22 [14]. Most of those seats are in states Trump won by double digits, but the party can only afford to lose two seats and retain majority control [14].

The six races widely considered toss-ups — Maine (Susan Collins), Michigan (open Democratic seat), Pennsylvania (Dave McCormick), Nevada (Jacky Rosen), Wisconsin (Tammy Baldwin), and Arizona (open Democratic seat) — are expected to determine control of the chamber [14]. If Texas becomes genuinely competitive, it stretches Republican resources across a seventh state, reducing the party's capacity to compete in those decisive races.

Sen. Lisa Murkowski (R-AK) said publicly that Trump's endorsement of Paxton "risks losing the seat" [15]. Sen. John Hoeven (R-ND) responded "Oh boy" when told of the endorsement and affirmed his support for Cornyn [15]. Sen. Roger Wicker (R-MS) refused to answer questions about it [15]. Multiple Republican senators have expressed outrage over the endorsement, though most have done so only on condition of anonymity [15][8].

Texas Demographics: The Ceiling Question

Texas has undergone significant demographic change since 2018, particularly in the suburban counties surrounding Houston and Dallas-Fort Worth. Harris County added nearly 195,000 voters in four years, while Collin, Tarrant, and Bexar counties each added more than 80,000 [16]. Suburban counties saw a 47% increase in ballots cast between 2016 and 2024, and some — like Kaufman County east of Dallas — have shifted leftward by an average of 4.7 points per election cycle [16].

However, the 2024 presidential election complicated the narrative of an inevitably purpling Texas. Trump's statewide margin expanded from 5.6 points in 2020 to 13.7 points in 2024, driven largely by surging rural turnout that offset Democratic gains in metro areas [16]. Rural counties netted Trump 1.3 million votes in 2024, up from 982,000 in 2016. Democratic margins in major metros actually shrank from 925,000 in 2020 to 535,000 in 2024 [16].

The tension for Paxton is that 2026 is a midterm election, not a presidential year. Midterms typically depress the turnout of irregular voters who drove Trump's 2024 rural surge, while suburban voters — the demographic most skeptical of Paxton — tend to participate more consistently. A Paxton candidacy tests whether Trump's expanded rural coalition shows up without Trump himself on the ballot.

The Steelman Case for Paxton

Supporters of Paxton and skeptics of establishment electability arguments make several points worth considering seriously.

First, the track record of Republican establishment "electability" predictions is mixed at best. In 2022, Trump-endorsed candidates did underperform in key races — Herschel Walker lost the Georgia runoff to Raphael Warnock by nearly 3 points, underperforming every other statewide Republican [17]. But Walker's loss occurred in a purple state, not deep-red Texas. Trump himself won Texas by nearly 14 points in 2024, and no Democrat has won a Senate race in the state in 38 years [12][16].

Second, Paxton's legal battles are largely resolved. The securities fraud case ended in a settlement, the FBI investigation was declined for prosecution, and the impeachment resulted in acquittal. Paxton's supporters argue these outcomes represent vindication, not liability — and that primary voters are better judges of what matters to Texans than Washington consultants [4][6].

Third, the establishment argument that Paxton will cost the party money in Texas assumes those dollars would otherwise be efficiently deployed. Cornyn's own primary demonstrated that massive spending advantages do not guarantee results; he was outspent roughly 3-to-1 and still lost by 28 points [7].

Fourth, some Republican primary voters view the electability argument as a proxy for ideological opposition — a way for the party establishment to resist candidates who challenge its preferences on immigration, spending, and executive power [4][6].

The Counter-Case: Why the Risks Are Real

Against these arguments, several data points suggest Republican concerns about Paxton are grounded in more than establishment bias.

The Cook Political Report does not shift ratings lightly, and a move from "Likely" to "Lean" in Texas is historically unusual [12]. Polling showing Talarico leading Paxton by 5-8 points, while both candidates remain below 50%, indicates a race that is at minimum genuinely contested [13].

Paxton's specific vulnerabilities — the affair, the whistleblower payouts, the impeachment — cut against him with precisely the voter groups that determine statewide margins in Texas: suburban women, independents, and college-educated Republicans [8][12]. These are the voters who swung toward Democrats in the 2018 midterms, when Beto O'Rourke came within 2.6 points of defeating Ted Cruz.

The NRSC's decision to delete its own opposition research on Paxton within hours of his victory — material that accused him of mortgage fraud, taxpayer abuse, and incompetence — will provide Democrats with ready-made campaign material [2]. The contrast between the party's pre-primary and post-primary positions on its own nominee is itself a vulnerability.

And the 2022 precedent is instructive: Walker's Georgia loss, combined with losses by Trump-backed candidates in Arizona and Pennsylvania, cost Republicans three Senate seats they had been expected to win [17]. The party's current 53-47 majority exists in part because the 2024 map was favorable enough to overcome some of those 2022 losses. A repeat of that dynamic in 2026 — even in just one or two races — could erase the majority entirely.

The NRSC's Awkward Pivot

Perhaps no institution embodies the party's predicament more than the NRSC itself. Under the leadership of its current chair, the committee spent months publishing detailed attacks on Paxton's fitness for office [2]. Deleted posts included a July 2025 statement calling out Paxton's "lies and incompetence" and an April 2025 statement criticizing his use of taxpayer money for campaign donors [2].

The rapid scrubbing of this content — and the committee's pivot to full support — illustrates the bind facing Republican institutional actors. They cannot oppose a Trump-endorsed nominee without risking a broader rupture with the party's base. But they also cannot un-ring the bell of their own prior arguments, which Democrats will resurrect at every opportunity.

Paxton, for his part, lacks the fundraising capacity that Cornyn brought to the table. Cornyn's ability to raise money for Republican colleagues nationwide — a function of his leadership position and his relationships with major donors — will not be replicated by a nominee whose primary campaign was outspent 3-to-1 and who lacks a Senate fundraising network [7][8].

What Happens If Paxton Loses

If Paxton wins the nomination and loses the general election to Talarico, the downstream effects extend well beyond Texas. With a 53-47 majority and only a two-seat margin for error, the loss of Texas would make Republican retention of the Senate dependent on winning virtually every other competitive race on the map [14].

In that scenario, races in Maine, North Carolina, and Iowa — where Republican incumbents are considered favored but not safe — become must-wins rather than insurance. The margin for unexpected losses in Michigan, Pennsylvania, or Nevada disappears entirely.

Beyond seat arithmetic, a Paxton loss would likely intensify the ongoing tension between Trump and Senate Republicans over candidate selection. Cornyn's allies have already drawn a direct line between Trump's endorsement and what they view as an unnecessary risk to the majority [8][15]. A general election defeat would transform that private grumbling into a public reckoning.

Looking Ahead

The Texas Senate general election will test several propositions simultaneously: whether Paxton's legal history is disqualifying in a state that has not elected a Democrat to the Senate since 1988; whether Trump's endorsement carries the same mobilizing power in a midterm as it does in a presidential year; and whether the Republican Senate majority is robust enough to withstand a candidate-quality problem in a state the party has long taken for granted.

Cornyn, in his final public remarks before the polls closed, called Paxton "an embarrassment" [18]. The next six months will determine whether that assessment was a sore loser's parting shot or an accurate prediction of what awaits the party in November.