President Donald Trump endorsed Texas Attorney General Ken Paxton (R-TX) on Tuesday, May 19, 2026 [1], for the U.S. Senate.
The endorsement signals a high-profile attempt to unseat longtime incumbent Sen. John Cornyn (R-TX). By backing a hard-line conservative, Trump is attempting to shift the ideological direction of the Texas delegation in the Senate.
Trump announced his support nationally for the Republican primary runoff. "I fully support Ken Paxton for Senate," Trump said [3]. The move comes as the state's GOP primary battle intensifies, with analysts noting that the decision is roiling the competition in the Lone Star State [5].
Paxton is positioned as a conservative hardliner in the race [2]. Trump's decision to back the Attorney General over Cornyn reflects a broader strategy to install preferred candidates who align with his specific political agenda in the Senate [4].
The timing of the endorsement is critical for the campaign. The runoff election is scheduled for one week after May 19, 2026 [6]. This leaves Paxton with a narrow window to leverage the endorsement to gain momentum among primary voters before they head to the polls.
Cornyn has served as a mainstay in the Texas GOP for years, but the challenge from Paxton, now bolstered by the former president, creates a volatile dynamic for the incumbent. The runoff will determine which Republican candidate advances to the general election to represent Texas in the U.S. Senate.
“"I fully support Ken Paxton for Senate."”
This endorsement represents a direct challenge to the traditional GOP establishment in Texas. By backing Ken Paxton over John Cornyn, Trump is leveraging his influence to replace a long-term incumbent with a candidate who mirrors his own hard-line approach to governance. The outcome of this runoff will serve as a bellwether for the level of control Trump maintains over Republican primary nominations in key battleground states.
