One of the main characteristics of politicians winning elections in Texas. Politically speaking the people Of Texas are spilling alot of establishment blood. I would bet money John Cornyn is in the process of reevaluating some of his "bi partisan" views...they hit with a thud when they were unveiled and he hasn't recovered since.
Ted Cruz' gravitational pull is indeed starting to yank Cornyn to the right. John's been doing the McCain/Hatch "I have an election coming" conservative camoflage dance lately.