Trump Endorses Ken Paxton for U.S. Senate, Elevating a Scandal-Plagued Ally Over John Cornyn

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On May 19, 2026, President Donald Trump endorsed Texas Attorney General Ken Paxton over four-term incumbent Senator John Cornyn in the Republican Senate primary runoff, a week before voting closed. On Truth Social, Trump called Paxton a "true MAGA Warrior" and said Paxton had "gone through a lot, in many cases, very unfairly," while faulting Cornyn for not supporting him "when times were tough." One week later, on May 26, Paxton defeated Cornyn in the runoff, becoming the Republican nominee for the seat and setting up a November contest against Democratic state representative James Talarico.

The endorsement is notable less for what it did to a single Senate race than for whom it elevated. Paxton spent nearly his entire decade as Texas's top law enforcement officer under felony indictment, was reported to the FBI by his own senior staff, and was impeached by a Republican-led legislature on bribery and abuse-of-office charges. Trump's intervention, and the base's response to it, has become a focal point in a long-running debate over how much corruption the modern Republican coalition is willing to tolerate, or reward.

A Decade Under Legal Cloud

Securities fraud indictment

In July 2015, months into his first term as attorney general, a Collin County grand jury indicted Paxton on three felony counts: two first-degree counts of securities fraud and one count of failing to register with state regulators. Prosecutors alleged he had recruited investors into a technology startup, Servergy, without disclosing that the company was compensating him with stock. A parallel civil complaint by the U.S. Securities and Exchange Commission was dismissed in 2017.

In March 2024, weeks before trial, Paxton reached a pretrial diversion agreement requiring roughly $300,000 in restitution, 100 hours of community service and 15 hours of legal ethics training. He was not required to enter a plea or admit wrongdoing. The charges were formally dismissed on June 18, 2025. He was reelected attorney general in 2018 and 2022 while the indictment remained pending.

The whistleblowers and Nate Paul

In late September and early October 2020, eight of Paxton's most senior aides reported him to the FBI, among them First Assistant Attorney General Jeff Mateer and Director of Law Enforcement David Maxwell. They alleged that Paxton had abused his office to benefit Austin real estate developer Nate Paul, a campaign donor under federal investigation, including by hiring an outside lawyer to pursue Paul's claims and sharing confidential law enforcement information. The aides also alleged Paul reciprocated with personal favors, including home renovations and the employment of a woman with whom Paxton was said to be having an affair.

Within weeks of learning that his staff had gone to federal agents, Paxton fired or pushed out the whistleblowers. Four of them sued under the Texas Whistleblower Act. Paul himself pleaded guilty in January 2025 to making a false statement to a financial institution and was sentenced in April 2025 to supervised release and a $1 million fine.

Impeachment and acquittal

The whistleblower suit produced the impeachment. When Paxton asked the Texas House in 2023 to approve $3.3 million in public funds to settle the case, lawmakers balked at footing the bill without answers, and the House General Investigating Committee opened a probe. On May 27, 2023, the House voted 121-23 to adopt 20 articles of impeachment on bribery, abuse-of-office and obstruction charges, suspending him from office. All 23 votes against came from Republicans; a majority of the chamber's Republicans, including Speaker Dade Phelan, voted to impeach. It was the first impeachment of a Texas attorney general and only the third impeachment of a state official in Texas history.

The Republican-controlled Senate tried 16 of the articles and acquitted Paxton on all of them on September 16, 2023, dismissing the remaining four. Only two Republicans, Kelly Hancock and Robert Nichols, voted to convict on any article; the most support any single article drew was 14 votes, short of the 21 needed to remove him. Many Republican senators said the House had failed to meet its burden of proof. Senate Democrats and Speaker Phelan argued the outcome reflected political pressure rather than the evidence, and Texas Tribune reporting later described deliberations in which some Republicans declined to cast a conviction vote once it became clear the threshold could not be reached. Paxton's wife, state Senator Angela Paxton, was required to attend but was barred from voting.

The judgment and dismissals

In April 2025, a Travis County judge awarded the four whistleblowers $6.6 million after finding the attorney general's office had violated the Whistleblower Act, noting that Paxton's office had stopped contesting liability. Paxton initially called the ruling "ridiculous" and vowed to appeal, then dropped the appeal in July 2025, leaving the judgment to be funded by Texas taxpayers. The federal corruption investigation that the whistleblowers triggered ended without charges: the Justice Department declined to prosecute Paxton in the final days of the Biden administration. The resolution of these cases cleared his path to run for Senate.

From "Free Ken Paxton" to the Endorsement

Trump has consistently positioned himself on Paxton's side. As the House moved to impeach in 2023, Trump posted "Free Ken Paxton" and vowed to "fight" Republicans who allowed the impeachment to proceed, later threatening to target any Republican who supported it. After the Senate acquittal, he congratulated Paxton on a "Texas sized VICTORY." Paxton had been one of Trump's most aggressive state-level allies, having led the failed 2020 lawsuit seeking to throw out the electoral votes of four states Joe Biden won.

The 2026 endorsement fit a broader pattern in Trump's second term of unseating Republicans he viewed as insufficiently loyal. In the same stretch, Louisiana Senator Bill Cassidy, who had voted to convict Trump in his second impeachment, lost his primary after Trump backed an opponent, and Kentucky Representative Thomas Massie fell to a Trump-endorsed challenger. Vice President JD Vance framed the message bluntly after the Paxton endorsement, saying lawmakers who do not serve the president's voters will find themselves "out of step."

The Runoff and Its Cost

Cornyn and Paxton advanced to a runoff after neither cleared 50 percent in the March 3 primary, with Cornyn narrowly ahead, 42 percent to 40.5 percent. Cornyn's campaign ran heavily on Paxton's record, with the senator calling Paxton unrepentant for his scandals and someone who "doesn't really care about anything else other than himself." The contest became the most expensive Senate primary in U.S. history, with combined spending well over $100 million.

Trump's endorsement broke the race open. Paxton won the May 26 runoff decisively, by more than 25 points despite being outspent roughly nine to one, becoming the first challenger in 56 years to defeat a sitting Texas senator in a primary. Paxton supporters had long cast the impeachment and investigations not as evidence of wrongdoing but as proof he was a fighter targeted by the establishment and a "corrupt" Washington, and they faulted Cornyn for his bipartisan work, including the gun-safety law passed after the 2022 Uvalde school shooting.

Reaction and Analysis

The endorsement crystallized two competing readings of what it signifies.

Critics argue it demonstrates an affirmative tolerance for, or even preference for, corruption within the party. The episode is striking precisely because the objections came from within: the whistleblowers were Paxton's own conservative appointees, and the impeachment was driven by a Republican supermajority. Political scientist Richard Hanania, a former Trump voter who has become a prominent conservative critic, has argued that populist movements tend to produce a "kakistocracy," or rule by the worst, because a politics organized around loyalty to a single leader elevates the least honest and competent figures while sidelining people with independent principles. He has cited economist Noah Smith's formulation that "Trumpism is kakistocracy." Brandon Rottinghaus, a political scientist at the University of Houston, told NPR the intraparty fight had left a lasting "stain" on Republican unity in the state.

Paxton's defenders reject the corruption framing entirely. They note that a Republican-controlled Senate acquitted him on every article it tried, that the securities charges were dismissed without a conviction or guilty plea, that the federal investigation produced no charges, and that voters reelected him twice with the allegations in plain view. In this account, the impeachment was a political vendetta led by establishment figures, and the runoff was a referendum on Cornyn's perceived disloyalty to Trump and his deal-making with Democrats rather than an endorsement of misconduct. Senator Ted Cruz and Governor Greg Abbott supported the 2023 acquittal, and Trump's own statement characterized Paxton as having been treated "very unfairly."

A separate strand of analysis is less about culpability than about electoral risk. Senate Republican leaders, who had poured resources into Cornyn, warned that Paxton would be a weaker and costlier general-election candidate. Senator Lindsey Graham said the nomination could make the race "three times more expensive." Democrats, who have not won a statewide race in Texas since 1994, openly welcomed the matchup, viewing Paxton's record as an opening. Early surveys support the toss-up framing: a Texas Southern University poll found a Paxton-Talarico race tied at 45 percent, essentially even with a hypothetical Cornyn-Talarico contest.

Outlook

Paxton enters the November general election as the Republican nominee for a seat his party has held without interruption for three decades, carrying a documented record that includes an impeachment by his own party, a multimillion-dollar whistleblower judgment paid by taxpayers, and a decade-long felony indictment that ended in dismissal rather than acquittal at trial. Whether that record proves to be a liability or, as his primary win suggests, an asset within his coalition will be tested by an electorate broader than the Republican base that nominated him.