An e-mail:

I appreciated your Corner post on Paul vs. Jindal. What I found most interesting though was Paul vs. Graham. It seems to me Graham made his ISIS comment with one purpose in mind: baiting Paul into overreacting and hitting back in a way that alienates large swaths of the base.
I suspect that Graham knows he can’t win the GOP primary. He’s in the race just to make sure that Rand doesn’t win either. And he’s learned exactly how to push Rand’s buttons.