President Donald Trump's long-awaited decision in the Texas Republican Senate primary runoff between Attorney General Ken Paxton and incumbent Senator John Cornyn remains the central focus for traders tracking endorsements. Trump has repeatedly signaled he will choose soon while praising both candidates, creating uncertainty ahead of early voting that begins May 18 for the May 26 contest. Recent developments include Cornyn's May 10 social media repost of material from a group critical of Trump, which drew immediate criticism from MAGA-aligned voices, alongside activist Scott Presler's public backing of Paxton tied to Senate delays on the SAVE America Act. These dynamics, combined with Trump's history of intervening in contested primaries, continue to shape expectations for an announcement that could influence turnout and party alignment in the final days before ballots are cast.