Former President Donald Trump has endorsed Ken Paxton in the Texas Republican Senate Primary, challenging incumbent Senator John Cornyn. This endorsement significantly boosts Paxton's position, as Trump remains a powerful influence within the Republican Party. The move has sparked tensions within the GOP, with some leaders expressing disappointment over Trump's choice. The endorsement has led to a notable shift in prediction markets, with Paxton's chances now priced at 94.5% for a YES outcome, while Cornyn's stand at 5.5%. Democrats view Paxton as a weaker candidate in the general election, potentially increasing their chances of winning the seat. The Texas Senate race developments could have broader implications for Republican Senate seat projections in the 2026 midterms.