RANDREW DICE CLAY?

Every Republican in the presidential race is going to say unkind things about Hillary Clinton, but is it a surprise that the nastiest zinger of the race so far came from the guy with a (deserved) reputation for snapping at journalists, particularly those who are women?

Sen. Rand Paul (R-Ky.) dinged Hillary Clinton during a speech in New Hampshire on Saturday, suggesting the Democratic presidential candidate could face a serious primary challenge.

"I'm starting to worry that when Hillary Clinton travels, there's gonna need to be two planes – one for her and her entourage, and one for her baggage," Paul, himself a presidential candidate, said to laughs and applause at the Republican Leadership Summit.

"I'm concerned that the plane with the baggage is really getting heavy and teetering," Paul added.

I get the feeling Paul is just getting warmed up. His confrontations with reporters suggest that he's not just running a tough campaign -- he viscerally has a mean streak, and we're going to see more of it as the months progress. I think that's really going to help him in the primary race, although I think there are too many hawks with too much money for him to actually to actually win the nomination. If he does somehow emerge victorious, I think most Americans are going to think he's too nasty to be president. But meanwhile, his party will cheer, which will only encourage him. So expect a lot more of this, and expect the insults to get a lot uglier.