John Cornyn Ken Paxton Senate: Primary Polls, Results
The 2026 Texas Republican Senate primary turned into one of the most closely watched party contests in the country. Two well-known Texas conservatives went head to head, and the result reshaped the state's political map. Here we walk through the candidates, the polling picture, the primary timeline, and the final results.
If you searched for the latest on the John Cornyn Ken Paxton senate race, you want facts you can trust. This piece covers what happened, what it means, and where to confirm every number. We also point you to official Texas election sources, since numbers can shift and you should verify before you rely on anything.
What Is Happening in the John Cornyn Ken Paxton Senate Primary?
The John Cornyn Ken Paxton Senate primary was a Texas Republican contest between incumbent Senator John Cornyn and challenger Ken Paxton for the party's U.S. Senate nomination. Paxton, the state's attorney general, defeated Cornyn in the primary runoff and became the 2026 Republican nominee. You can read our full breakdown in our Texas Senate race explainer.
Texas Senate seat at stake
This race is for one of Texas's two seats in the United States Senate, not a seat in the Texas Legislature. The U.S. Senate is the upper chamber of Congress in Washington. Each state elects two senators who serve six-year terms.
Whoever wins in November represents all of Texas in Washington. That statewide reach makes the seat a big prize in national politics.
Incumbent-versus-challenger dynamic
Cornyn ran as the four-term incumbent with 24 years in the Senate. Paxton ran as the statewide challenger with three prior statewide election wins as attorney general.
Primaries against sitting senators rarely succeed. That is exactly why this one drew so much attention, and why the outcome mattered.
Why this race is drawing national attention
Control of the U.S. Senate runs through races like this one. A Republican primary that unseats a long-serving incumbent signals where the party's voters are moving.
Cornyn's loss made him the first Republican U.S. senator from Texas to lose a primary while seeking reelection.
He was the first Texas senator from either party to lose renomination since 1970.
The result fed a wider national story about the direction of the GOP.
Who Are Ken Paxton and John Cornyn?
Ken Paxton is Texas's attorney general and the Republican challenger who won the nomination, while John Cornyn is the incumbent Republican U.S. senator he defeated. Both built long records in Texas politics before facing each other. Our Ken Paxton history page covers his path in more detail.
Ken Paxton's political background
Paxton has served as Texas attorney general since 2015. Before taking statewide office, he served in the Texas House and the Texas Senate.
He built a national profile as a Trump-aligned conservative legal fighter, filing suits against the federal government under Democratic presidents. Our campaign biography lays out that record.
John Cornyn's political background
Cornyn was first elected to the Senate in 2002 and served his fourth term during the 2026 race. Before that, he served as a Bexar County district judge, a Texas Supreme Court justice, and Texas attorney general.
He also served as Senate Republican Whip, the No. 2 GOP leadership post, from 2013 to 2019. That gave him an establishment profile inside Washington.
Key differences voters are watching
Incumbency versus challenge: Cornyn's Washington seniority against Paxton's outsider push.
Experience type: Senate deal-making against a state-level legal record.
Republican appeal: Cornyn's traditional base against Paxton's Trump-aligned coalition.
When Is the Texas Republican Senate Primary?
The Texas Republican Senate primary followed the state's official election calendar, with the primary and runoff set by Texas election law and certified by state officials. The first-round primary ran March 3, 2026, and the runoff ran May 26, 2026. Always confirm dates with the Texas Secretary of State before you rely on them.
Primary election date
Texas held its 2026 primary on March 3, 2026. No candidate cleared a majority, so the race moved to a runoff. Confirm any date through the Texas Secretary of State or your county election office.
Early voting and mail ballot timing
Texas offers an early voting window before each Election Day, plus mail ballots for eligible voters. Windows and deadlines vary by election, so rely on official county guidance.
Early votes often report first on election night. That matters for how the results look in the first hours.
Runoff rules in Texas
Texas primaries require more than 50% of the vote to win outright. If no one hits that mark, the top two finishers advance to a runoff.
In the first round, Cornyn placed first with about 42 to 43%, Paxton took roughly 41%, and Rep. Wesley Hunt drew about 13%. That triggered the May 26 runoff.
What Do the Polls Say About Paxton vs. Cornyn?
Polls can show the direction of a race, but read them cautiously because primary electorates are smaller, more variable, and turnout-dependent. In the Paxton-Cornyn runoff, most public polling showed Paxton ahead. Verify every poll through its named source before you trust it.
Latest public polling snapshot
Runoff polling generally favored Paxton. A few examples with methodology:
Quantus Insights (5/25/2026, 1,018 likely voters, ±3.5%): Paxton 53%, Cornyn 43%.
Global Strategy Group (5/20/2026, 600 likely voters, ±4%): Paxton 52%, Cornyn 40%.
University of Houston Hobby School (5/05/2026, 1,200 likely voters, ±2.8%): Paxton 48%, Cornyn 45%.
What margin of error means
Margin of error tells you how much a poll's numbers could move up or down. A lead smaller than the margin is a statistical tie, not a clear edge.
So a 3-point lead with a ±3.5% margin means the race could really be even. Bigger, consistent leads carry more weight.
Why primary polls can move quickly
Lower turnout makes models harder to build.
Late endorsements can swing voters fast.
Debates, ads, and news cycles shift opinion.
Early voting locks in choices before Election Day.
What to watch besides topline numbers
Look past who leads. Watch favorability, undecided share, enthusiasm, regional strength, and support among frequent primary voters. Those often predict turnout better than a single topline.
Where Can Voters Find Official Primary Results?
Voters can find official Texas primary results through the Texas Secretary of State and county election offices, with final certified numbers published after officials finish verification. The state's official results portal is the authoritative source. Do not rely on social media posts alone.
Election-night results
Election night shows unofficial results. Early vote totals report first, then Election Day precincts trickle in. Totals change through the night as more precincts report.
Certified results
Certified results come after canvassing. Final numbers can differ slightly from election-night reports as officials verify every ballot.
The runoff ended with Paxton at about 63.8% and Cornyn at 36.2%, a margin near 28 points across roughly 1.38 million votes.
County-level reporting
County election administrators post local updates. Large counties and rural turnout both shape the statewide picture. On runoff night, even urban counties like Tarrant shifted toward Paxton.
What Do the Results Mean for the Texas Senate Race?
The results showed Republican primary voters chose Paxton, ended the race without a further runoff, and pointed to strong turnout among his supporters. Paxton now faces Democrat James Talarico in the November 3, 2026 general election.
Outright win or runoff
The March primary produced no majority, so a runoff followed. The May 26 runoff produced a clear winner, so the nomination was settled and moved to the general election.
Turnout signals
Turnout told the story. Paxton's vote total held steady from March to May, while Cornyn's fell by more than 400,000 votes. As Brookings put it, Paxton's voters showed up and Cornyn's did not.
Regional voting patterns
Paxton gained ground broadly, including in urban counties where Cornyn led in March. Tarrant County early vote reportedly swung to Paxton 59% to 41% in the runoff, a sharp reversal from the first round.
General election implications
Paxton carries the Republican nomination into November. Building a statewide coalition and turning out conservative voters will decide the general election. Verify all figures through official sources as the race develops.
How Are Border Security, Election Integrity, and Conservative Priorities Shaping the Race?
Border security, election integrity, limited government, and constitutional rights are central to this race because they rank high for many Republican primary voters in Texas. These issues drive turnout and shape how candidates message.
Border security
Border policy sits at the center of Texas politics. Federal-state tension, border communities, and public-safety concerns keep enforcement a top voter priority.
Election integrity
Voter confidence and ballot security stay front and center in Republican primaries. Many voters want lawful, transparent elections and clear state election laws.
Limited government and federal spending
Spending restraint and pushback on federal overreach define much of the conservative agenda. Voters look for candidates who promise fiscal discipline.
Constitutional rights
Second Amendment protections, religious liberty, and free speech matter to this electorate. So does the role of the courts and federal legislation in defending those rights. See where we stand on these in our issues coverage.
How Should Readers Follow Updates on the Race?
Follow official election offices, reputable news outlets, and direct campaign communications to track verified updates on polls, voting, and results. Compare multiple sources and confirm numbers before you share them.
Official election sources first
Start with the Texas Secretary of State and your county election office. Their official results pages are the authoritative record. Everything else is secondary.
Campaign and candidate updates
Campaign websites, email updates, and issue pages carry direct statements. Our campaign site lays out Ken Paxton's record and positions in his own words.
Reputable news and polling outlets
Trust polls that name their pollster, field dates, sample type, and margin of error. Skip unsourced social media claims that lack those details.
Frequently Asked Questions
Is John Cornyn running for reelection?
Cornyn sought reelection in 2026 but lost the Republican primary runoff to Ken Paxton on May 26, 2026. He is not the party's nominee. Confirm his current status through official election filings.
Has Ken Paxton run for U.S. Senate before?
Paxton's prior statewide roles were as Texas attorney general, plus earlier service in the Texas House and Senate. The 2026 race is his run for the United States Senate, and he won the Republican nomination.
How many votes are needed to avoid a Texas primary runoff?
A candidate generally needs more than 50% of the vote to win a Texas primary outright. If no one clears that threshold, the top two finishers advance to a runoff.
Are primary results final on election night?
No. Election-night results are unofficial until county and state officials complete canvassing and certification. Final certified numbers can differ slightly from election-night totals.
Can independent voters participate in the Texas Republican primary?
Texas has no party registration, so eligibility depends on state primary rules. A voter can request either party's primary ballot but cannot cross over to another party's runoff after voting in one party's primary that year.
The Road Ahead for Texas Voters
The john cornyn ken paxton senate primary settled the Republican nomination and set up a general election with real stakes for Texas and for Senate control. Paxton won the runoff decisively, and the contest now moves to November 3, 2026.
Stay informed and stick to verified sources. Check the Texas Secretary of State and your county election office, know your voting calendar, and take part in the process.
For issue positions and campaign updates, visit our record and agenda page. Verify every poll, finance figure, and ballot detail through official Texas sources, since numbers shift right up to Election Day.
