(FILES) (COMBO) This combination of pictures created on March 04, 2026 shows, L/R, US Senator John Cornyn, Republican of Texas, in Washington, DC on March 11, 2024 and Texas Attorney General Ken Paxton in National Harbor, Maryland, on February 23, 2024. US President Donald Trump on May 19, 2026, endorsed scandal-plagued Texas attorney general Ken Paxton over incumbent John Cornyn in a high-stakes Senate primary runoff, siding with a loyalist over the establishment conservative backed by Republican leaders. The endorsement, delivered a week before the May 26 vote, was a blow to Cornyn, a four-term incumbent whom national Republicans have spent tens of millions of dollars defending as the stronger candidate for November's midterm election. (Photo by Mandel NGAN / AFP via Getty Images)