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,

Former U.S. Attorney and Elon Musk lawyer John Bash is the first to throw his hat in the ring to replace Attorney General Ken Paxton.

Texas Attorney General Ken Paxton on Tuesday night announced a primary challenge against longtime Sen. John Cornyn, setting the stage for a battle between two politicians representing different parts of the Republican Party.