Trump SLAMS GOP Senator as ‘VERY Disloyal’

President Trump just called a sitting Republican U.S. senator “VERY disloyal” and threw his full weight behind his primary challenger — and Tuesday’s Texas runoff will reveal whether that kind of presidential pressure can take down one of the Senate’s longest-serving incumbents.

Story Snapshot

Trump endorsed Texas Attorney General Ken Paxton over incumbent Senator John Cornyn, publicly labeling Cornyn “very disloyal” on Truth Social ahead of the May 27 Republican runoff.
Vice President JD Vance reinforced the endorsement, saying Paxton “was there for the country, was there for the president” when it mattered most.
Cornyn fired back, warning that Paxton would be “an albatross around the neck of our candidates” and could lose the general election to the Democratic challenger.
The race has consumed more than $135 million over 14 months, making it one of the most expensive Senate primary battles in Texas history.

Trump Pulls No Punches Against Cornyn

President Trump formally endorsed Texas Attorney General Ken Paxton in the Republican Senate runoff, posting on Truth Social that Paxton “has always been extremely loyal to me” while describing incumbent Senator John Cornyn as “a good man, but not supportive when times were tough.” Trump went further over the weekend, branding Cornyn “VERY disloyal” — an unusually sharp public rebuke of a sitting Republican senator from his own party’s president. ^[1]

Vice President JD Vance amplified the message at a White House briefing, stating he had known Cornyn for a long time but that “when it really counted, Ken Paxton was there for the country, was there for the president.” The dual endorsement from both Trump and Vance signals that this race is being treated not as a routine primary but as a loyalty test for the MAGA movement’s grip on Texas Republican politics. ^[2]

Cornyn Pushes Back on Electability

Cornyn did not retreat quietly. The four-term senator argued that Paxton would be “an albatross around the neck of our candidates” in the November general election, warning that the attorney general could “likely lose to James Talarico,” the Democratic challenger. Cornyn’s argument centers not on ideology but on electability — the claim that nominating a candidate with Paxton’s legal and political baggage hands Democrats a competitive opening in a state Republicans have held for decades. ^[3]

Some Republican institutional figures reportedly urged Trump to stay with Cornyn for precisely that reason, concerned that a Paxton nomination creates general-election vulnerability. The University of Houston’s Hobby School of Public Affairs has been tracking the race, noting that the central question at the top of the May ballot is whether Cornyn can survive the challenge despite the presidential headwinds. ^[5] Cornyn also notably declined on Sunday to commit to endorsing Paxton if the attorney general wins the runoff — a rare public act of defiance against a sitting president from within his own party.

What $135 Million and 14 Months Reveals

The sheer scale of this contest tells its own story. According to the Texas Tribune, the race has stretched nearly 14 months and consumed over $135 million — a staggering sum for an intraparty primary in a state that isn’t even considered competitive at the presidential level. ^[4] That level of spending reflects how much both sides understand the stakes: control of the Senate, the direction of the Texas Republican Party, and the question of what “loyalty” to Trump actually demands of elected officials.

Sen. John Cornyn (R-Texas) on Sunday would not commit to backing Trump-endorsed Attorney General Ken Paxton (R) if he wins the upcoming Texas Republican Senate runoff election to face Democrat James Talarico in November. https://t.co/2s4WkqA3MU

— WGNO-TV (ABC) New Orleans (@WGNOtv) May 25, 2026

For voters across the political spectrum who are tired of watching Washington insiders protect their own seats above all else, this race crystallizes a tension that has been building for years. Cornyn represents the old guard — experienced, institutionally connected, and focused on governing coalitions. Paxton represents the insurgent base — confrontational, Trump-aligned, and willing to burn bridges with the establishment. Whichever way Tuesday goes, the result will send a clear signal about whether presidential endorsements can reliably dislodge entrenched incumbents, and whether Republican voters in Texas are more motivated by movement loyalty or general-election pragmatism.