Senate Majority Leader John Thune (R-SD) said he continues to support Sen. John Cornyn’s bid for a fifth term [2].
This development highlights a public rift between the Senate GOP leadership and President Donald Trump over the direction of the Republican primary in Texas. The tension arises as the president chooses to back a challenger over a long-serving incumbent.
Speaking at a press conference in Washington, D.C., on May 19, 2026 [1], Thune responded to the president's decision to endorse Texas Attorney General Ken Paxton. The endorsement of Paxton occurred on the same day [3].
"Sen. Cornyn is a principled conservative. He is a very effective senator for the state of Texas," Thune said [4].
Thune addressed the friction between the executive branch and the legislative leadership by noting the limits of his influence over the president's political choices. He said, "None of us control what the president does" [4].
Cornyn is currently seeking his fifth term in the U.S. Senate [2]. Despite the president's preference for Paxton, Thune said he still backs the incumbent senator [5].
This interaction occurs as party leaders discuss their broader legislative agenda. Thune's comments serve to maintain stability within the Senate Republican caucus while acknowledging the president's role in shaping party nominations, a dynamic that has defined recent GOP electoral cycles.
“"None of us control what the president does."”
The disagreement underscores a persistent tension within the Republican Party between institutional loyalty and the influence of Donald Trump. By reaffirming his support for Cornyn while simultaneously admitting a lack of control over the president, Thune is attempting to balance the authority of the Senate leadership with the political reality of Trump's grip on the GOP base.
