Texas voters are casting ballots today, May 26, 2026 [1], in a Republican primary runoff for a U.S. Senate seat.
The outcome of this race will determine whether incumbent Senator John Cornyn (R-TX) retains his seat or is replaced by Texas Attorney General Ken Paxton (R-TX). The contest serves as a litmus test for the influence of President Donald Trump over the Texas GOP and the party's direction in the state.
The race has been heavily shaped by the involvement of President Trump. According to reports from the Associated Press and Lufkin Daily News, Trump endorsed Paxton last week [2]. This move aligns with Trump's broader strategy to support candidates he views as more loyal to his political agenda [3].
However, there has been conflicting information regarding the timing and certainty of that endorsement. While some reports indicate the endorsement was finalized mid-May [2], a report from AOL said that Trump said he would "make a decision… maybe relatively soon" [4]. Despite these contradictions, the influence of the former president remains a central theme of the runoff.
Senator Cornyn has faced a challenging campaign as he navigates the shift in the Republican base toward the wing of the party aligned with Trump. Attorney General Paxton has leaned into his image as a combatant in the legal and political battles of the last several years to attract voters.
The runoff follows a primary cycle that highlighted deep divisions within the Texas Republican Party. Voters are now deciding if the state prefers the established legislative experience of Cornyn, or the more aggressive approach championed by Paxton and supported by Trump [3].
“The contest serves as a litmus test for the influence of President Donald Trump over the Texas GOP.”
This runoff reflects a broader national struggle within the Republican Party between traditional institutionalists and the populist movement led by Donald Trump. If Paxton wins, it would signal a definitive shift in Texas toward a more confrontational style of governance and cement Trump's ability to unseat incumbents who are not viewed as sufficiently loyal.
