Ken Paxton decisively defeated Senator John Cornyn in Texas's Republican Senate runoff on Tuesday, marking another victory for former President Trump's endorsement strategy in 2024. Paxton secured approximately 64 percent of the vote with over 95 percent counted, delivering a commanding defeat to the two-term incumbent.
Cornyn's loss represents a significant shift in Texas Republican politics. The senator held office for 18 years and served as Senate Republican Whip, yet Trump's backing of Paxton proved decisive. Trump had endorsed Paxton in May, citing his alignment with Trump's America First agenda and criticizing Cornyn's cooperation with Democrats on judicial nominees and other matters.
The runoff emerged after neither candidate achieved the 50 percent threshold required in Texas primaries during the March general election. Cornyn finished first in that round with 43 percent to Paxton's 22 percent, but Paxton's momentum accelerated dramatically in the runoff phase.
Paxton's victory underscores Trump's continued influence over Republican primary contests despite facing multiple legal challenges. The Texas attorney general had faced his own legal troubles, including a 2023 impeachment by the Texas House and federal indictment on securities fraud charges, yet these controversies failed to dent his primary appeal among Trump-aligned voters.
The runoff outcome carries implications for the general election. Texas remains solidly Republican in statewide races, making the GOP nomination essentially determinative. Paxton will advance as the Republican nominee against Democratic nominee Colin Allred in November's general election.
Cornyn's defeat signals that even establishment Republican incumbents with legislative experience face vulnerability when Trump actively campaigns against them. The result reflects broader patterns observed in 2024 primaries, where Trump-backed candidates have enjoyed outsized success in challenging sitting lawmakers and establishment-preferred candidates.
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