Ken Paxton won Trump’s endorsement, but may struggle in a general election.

The president had long considered backing Senator John Cornyn, but Ken Paxton, the state attorney general, carried the support of the MAGA base.

The president's endorsement is a blow to longtime Sen. John Cornyn, whom Senate Republicans had begged Trump to support.

President Donald Trump made his long-awaited endorsement in the Texas Senate primary set for May 26 between John Cornyn and Ken Paxton.