Key Race in Texas U.S. Senate Runoff

Voters in Texas return to the polls on Tuesday to choose the Republican candidate for the U.S. Senate in the upcoming midterm elections. Current Senator John Cornyn faces a challenge from Texas Attorney General Ken Paxton, who has received an endorsement from President Donald Trump.

Trump’s Influence

After a period of hesitation, Trump announced his support for Paxton over the four-term incumbent Cornyn. Despite Trump’s generally positive relationship with Cornyn, his endorsement aims to show his influence in midterm races. Recent polling indicates Paxton has a slight advantage over Cornyn, reflecting his popularity within the Republican base.

Polling Data

Recent polls present a consistent lead for Paxton in the Republican Senate runoff:

• Quantas Insights (May 21-23): Paxton 52.7%, Cornyn 43.4%, with a margin of Paxton +9.3% (MOE ±3.5%)
• University of Houston Hobby School (April 28-May 1): Paxton 48%, Cornyn 45%, and 7% Uncommitted (margin of Paxton +3%)
• Global Strategy Group – Democrat sponsor (May 6-11): Paxton 52%, Cornyn 40%, with a margin of Paxton +12% (MOE ±4%)

The average polling results from March to May indicated Paxton had approximately 48.8% compared to Cornyn’s 41.0%, with an average margin of Paxton +7.8%. This gap has expanded after Trump’s endorsement.

Prediction Markets Insights

Prediction markets highlight Paxton’s stronger chance of winning, with a 95% probability on Kalshi as of Monday. Cornyn had only a 4.4% chance of securing the nomination. Participants in another market showed a likely 10- to 15-point lead for Paxton, with a possibility of more than a 20-point gap.

On Polymarket, Paxton had a 77% probability of leading Cornyn by more than 9%, and a 96% likelihood of winning overall. These odds improved notably after Trump’s endorsement, which pushed Paxton’s former 62% standing to much higher chances.

Statements from Trump and Candidates

Trump vocalized his strong support for Paxton on May 19, describing him as a “MAGA Warrior” and emphasizing loyalty and victory in his Truth Social messages. Meanwhile, Paxton expressed gratitude for the endorsement, reaffirming his commitment to Trump’s agenda.

Cornyn was criticized by Trump for perceived disloyalty regarding key legislative efforts. Paxton’s response to Trump’s endorsement highlighted his readiness to champion the ‘America First’ agenda in the Senate.

The Democratic Challenge

The candidate winning the Republican runoff will face Democratic State Senator James Talarico in November. Talarico, noted for combining faith-based initiatives with progressive policies, has established significant support statewide. Although Texas favored Trump by a large margin previously, Talarico is considered a strong challenger.

Following Trump’s endorsement of Paxton, Talarico commented that the underlying issue isn’t the runoff victor but rather a political system favoring the wealthy. He highlighted his campaign’s goal to represent working individuals over partisan divisions.

Market analyses reflected the election’s competitiveness, providing Republicans a narrow 55% likelihood of maintaining the Senate seat, compared to Talarico’s 45%. A specific forecast showed Paxton with a 57% probability of defeating Talarico.

Cornyn has been vocal about the risks to the GOP should Paxton proceed against Talarico, given the Democrat’s funding and campaign momentum. Cornyn recalled his 10-point victory in 2020 but warns of Paxton’s potential vulnerabilities in a general election setting.