Ken Paxton, the attorney general of Texas, officially announced on Tuesday that he was challenging Senator John Cornyn in the Republican primary next year, setting up what is likely to be the most contentious and expensive intraparty contest of 2026.
Mr. Paxton, a firebrand conservative litigant who has sought to strongly align himself with President Trump, had been teasing a run against Mr. Cornyn for weeks. He all but announced his intentions in an interview with The New York Times last week.
On Tuesday, Mr. Paxton unveiled a website for his nascent campaign, prominently featuring a photo of him posing with Mr. Trump. “They tried to take him down. Now, he’s taking a sledgehammer to the D.C. establishment,” the site reads.
This is a developing story. Check back for updates.
