You can put this in the McCain vs. Cruz category.
Via the Blaze:
As Jason reported last night, New Jersey Gov. Chris Christie pushed back against libertarian-leaning conservatives in the Republican Party, including Kentucky Sen. Rand Paul. When applied to national security, Christie warned that such libertarian thinking is “a very dangerous thought.”
With Christie’s comments making headlines, it didn’t take long for Paul to fire back, via Twitter:
There’s plenty more here.