Texas Republican Senate runoff: Cornyn vows ‘judgment day is coming for Ken Paxton’ Republican Sen. John Cornyn, advancing to a runoff with Texas Attorney General Ken Paxton for the GOP Senate nomination, takes aim at his rival. NEW You can now listen to Fox News articles! DALLAS — The race for the Republican Senate nomination in Texas is heading to a high-stakes runoff, with both sides digging in for a costly, drawn-out fight. Longtime incumbent Sen. John Cornyn, R-Texas, and Texas Attorney