Trump's endorsement decisions in the 2026 Republican primaries have centered on clearing fields early for aligned candidates, with a strong track record of success in House, Senate, and state races. In Texas, market attention has focused on the Senate contest involving incumbent John Cornyn and Attorney General Ken Paxton, where trader positioning reflects speculation over timing and choice amid Trump's pattern of supporting incumbents in safer seats. Broader context includes over 300 endorsements issued this cycle, often months ahead of voting, alongside scheduled announcements that could shift probabilities in key states. Upcoming primaries and any direct statements from Trump or his circle on remaining races represent the main near-term catalysts for updates in these markets.