Key Points
Trump's endorsement proved decisive in ousting Cornyn despite $100 million spending.
Paxton won 64% of vote, marking first Republican Senate primary loss in Texas history.
Democrats view Paxton as weaker general election candidate than Cornyn.
Race now rated Lean Republican instead of Likely Republican by Cook Political Report.
Texas Attorney General Ken Paxton defeated four-term Senator John Cornyn on May 27 in a Republican runoff primary, winning 64% of the vote to Cornyn’s 36%. President Trump’s endorsement of Paxton last week proved decisive in what became the most expensive Senate primary campaign in US history. The outcome forces Cornyn into retirement and sets up a closely watched November general election between Paxton and Democratic state legislator James Talarico that could determine Senate control.
Trump’s Endorsement Sealed Cornyn’s Defeat
Trump endorsed Paxton last week as a “true MAGA warrior,” energizing his base during early voting. Cornyn, a 23-year congressional veteran and former Senate Republican leader, spent nearly $100 million trying to win back Trump’s favor. He voted against Trump’s impeachments, highlighted his pro-Trump voting record, and backed parts of Trump’s immigration agenda. Trump dismissed these efforts, calling Cornyn “very disloyal” and accusing him of questioning Trump’s political future in 2023.
Democrats See a Path to Flip Texas
The Cook Political Report moved the race from Likely Republican to Lean Republican after Paxton’s victory. Analysts note that Democrats view Paxton as the weaker candidate compared to Cornyn. A University of Texas poll from mid-April found that Talarico performed roughly equally against each Republican. Nearly 1 in 5 voters polled remained undecided, leaving significant room for movement. Texas has not elected a Democrat to the Senate since 1988.
Paxton’s Legal Baggage and Trump’s Loyalty Test
Paxton, 63, faces significant legal and personal challenges. He was impeached by the Texas House on abuse of office charges and acquitted by the state Senate. His senior staffers reported him to the FBI for allegedly using his position to help a donor; the FBI later dropped the investigation. His estranged wife, state Sen. Angela Paxton, filed for divorce last year citing adultery. Despite this record, Paxton won with Trump’s backing, demonstrating the president’s control over Republican primary voters.
A Rare Moment of Republican Vulnerability
Cornyn’s loss marks the first time a Republican senator from Texas lost his party’s nomination for re-election. It also continues a pattern of Trump-backed challengers ousting Republican incumbents. Louisiana Senator Bill Cassidy failed to reach his party’s runoff just 10 days earlier. The Texas race is already the second most expensive in the country this year, after the California governor election, with over $108 million spent so far.
Final Thoughts
Paxton’s primary victory reshapes the November race and gives Democrats realistic odds of flipping a Texas Senate seat for the first time in 38 years. However, Paxton still faces significant headwinds in a state that has not elected a Democrat statewide since 1994.
FAQs
Paxton won with 64% of the vote compared to Cornyn’s 36%, securing a decisive 28-percentage-point margin.
Trump criticized Cornyn as disloyal for questioning his political future and delayed endorsement, backing Paxton as a true MAGA warrior instead.
Paxton faces impeachment, FBI investigation, and divorce allegations, potentially weakening his general election prospects versus Cornyn.
Disclaimer:
The content shared by Meyka AI PTY LTD is solely for research and informational purposes. Meyka is not a financial advisory service, and the information provided should not be considered investment or trading advice.
About Author

Danny Kontos
Co FounderDanny Kontos has been a stock investor since 2007 and co-founded Meyka in 2023. He keeps a small, focused portfolio and only moves when the numbers are hard to argue with. He has waited years on a single position before. Before Meyka, he ran a web hosting company and a mortgage lending platform, so he knows what a well-run business actually looks like under the hood. This article did not come from a news cycle. It came from someone who has been watching this space for a long time.
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