Senator John Cornyn (R-TX) conceded defeat in the Texas Republican primary runoff for the U.S. Senate after Attorney General Ken Paxton secured victory.

The loss marks a significant shift in Texas GOP leadership, removing a long-term incumbent in favor of a candidate with strong support from the party's right wing.

Cornyn addressed the loss in a public statement. "We've come up short," Cornyn said [1].

The runoff election took place in mid-May 2026 [2]. Paxton's victory was bolstered by significant support, including an endorsement from former President Donald Trump [2].

Cornyn has served as the U.S. Senator from Texas as the incumbent, but the primary challenge from Paxton proved successful in the runoff. The transition in the Republican nomination follows a competitive primary cycle that culminated in the mid-May vote [2].

Paxton, the current Attorney General of Texas, now holds the Republican nomination for the seat. The results of the runoff finalize the party's candidate for the general election, ending Cornyn's bid for another term in the Senate [1], [2].

"We've come up short."

This result signals a continuing trend toward candidates aligned with the populist wing of the Republican Party. By replacing a veteran legislator like Cornyn with Attorney General Ken Paxton, the Texas GOP is shifting its representation toward a more confrontational legal and political style, heavily influenced by the endorsement of Donald Trump.