Texas Republican Sen. John Cornyn is set to face off in a runoff against Attorney General Paxton, where he is expected to be a slight favorite. The race could potentially cost the party tens of millions of dollars to protect Paxton. The Democratic Senatorial Campaign Committee has warned that Paxton's nomination would end three decades of GOP dominance in the state and take down-ballot Republicans with him in defeat. However, making the race competitive in Texas requires significant investment from Democrats, particularly in the 20 media markets where a week of television advertising could cost multiple millions of pounds. Despite this, many party operatives believe that Paatt's ability to turn the race around is limited unless he receives an endorsement from President Donald Trump.