Texas Attorney General Ken Paxton is running for the U.S. Senate in a primary challenge against Republican Sen. John Cornyn, setting up what is likely to become one of the GOP’s most contentious and expensive contests of 2026.

Texas Attorney General Ken Paxton's entry into the U.S. Senate race against incumbent John Cornyn could serve as a litmus test for a Republican party in flux. "It's an establishment versus an insurgent campaign,

After months of hinting at a run for U.S. Senate, Texas Attorney General Ken Paxton’s path has become clearer since the dismissal of a federal investigation