Hours after Trump endorsed Ken Paxton, Sen. John Cornyn fired back, calling Paxton \

Unusually for a race of this size, Paxton allies are pointing the finger at a single donor: Leonard Leo, the conservative powerbroker.

Sen. John Cornyn does not believe President Donald Trump will make an endorsement in his competitive primary runoff against Ken Paxton.

Donald Trump will announce who he is backing in the Texas Senate race, which features Sen. John Cornyn and state Attorney General Ken Paxton.