Allies of President Donald Trump have been quick to threaten primary challengers for Republican senators who don’t back Trump ...

John Cornyn, Texas Cornyn in the past has been ... Potential challengers: Texas Attorney General Ken Paxton is one of the state's most powerful Republicans and also suggested Cornyn should be ...

Potential challengers: Cassidy has already drawn a Republican challenger, state Treasurer John ... Ken Paxton is one of the state's most powerful Republicans and also suggested Cornyn should ...