President Donald Trump on Tuesday endorsed Texas Attorney General Ken Paxton in the Texas Republican Senate runoff.

"I know Ken well, have seen him tested at the highest and most difficult levels, and he is a WINNER! Ken is a Strong Supporter of TERMINATING THE FILIBUSTER and, very importantly, THE SAVE AMERICA ACT," Trump posted on Truth Social. "Perhaps Ken can help move these important elements of Government forward."

"Ken is a true MAGA Warrior who has ALWAYS delivered for Texas, and will continue to do so in the United States Senate," Trump added. "Ken Paxton has gone through a lot, in many cases, very unfairly, but he is a Fighter, and knows how to WIN... Ken Paxton has my Complete and Total Endorsement to be the next United States Senator from the Great State of Texas."

Trump passed over Sen. John Cornyn, R-Texas, in making the endorsement. The president called Cornyn a "good man," but noted several policy disagreements between them and Cornyn's hesitance to back his own presidential campaign.

Cornyn, who first won the seat in 2002, placed first in the initial primary, but fell short of the threshold to avoid a runoff. The elimination of Rep. Wesley Hunt, R-Texas, appears to have boosted Paxton, whom polling has shown with a clear lead.

The runoff is set for May 26.

After the first round, Trump announced he would issue an endorsement in the race and ask the non-recipient to drop out. Paxton, for his part, offered to drop out if Cornyn could secure passage of the SAVE Act, a marquis voter ID bill that has languished in the upper chamber. Cornyn was unable to do so and Trump's endorsement was delayed until today.

Incumbent senators lose their primaries relatively rarely, though Sen. Bill Cassidy, R-La., was handily defeated by the Trump-backed Rep. Julia Letlow, R-La., this month. Cassidy placed third behind Letlow and state Treasurer John Fleming. The two face their own runoff contest to decide the GOP nominee.

Prior to Cassidy, the last Republican senator to lose a primary was Sen. Richard Lugar, R-Ind., in the 2012 race.

Ben Whedon is the Chief Political Correspondent for Just the News. Follow him on X.