In a Texas Senate primary runoff, Attorney General Ken Paxton defeated incumbent John Cornyn, with President Trump's endorsement playing a key role. - Trump endorsed Paxton as a "true MAGA Warrior" and criticized Cornyn as disloyal.
- Cornyn had tried to win Trump's favor with a 99% voting record and policy reversals, including dropping his filibuster support. - The loss adds to a series of primary defeats for incumbents who crossed Trump.
- Cornyn had previously dismissed Trump's political comeback in 2023. The result reinforces Trump's dominance over the Republican Party and his willingness to punish past dissent.