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,

Texas Attorney General Ken Paxton announced a run for the U.S. Senate on Tuesday, pitting himself against Sen. John Cornyn, a fellow Republican.

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.