Another candidate Rand Paul has not tussled with -- despite plenty of prodding -- is Rick Santorum. The former Pennsylvania senator has tried repeatedly to engage Paul. He called him a "
bomb-thrower" this weekend, hit him on isolationism in
a September op-ed, and suggested in May that the GOP won't nominate Paul
because he's too libertarian.
Hitting back at Santorum would be what political folks like to call "punching down," and Paul is probably wise not to get mixed up.