the Republican ones do. the democratic ones don't, however. (interesting to note that clinton has made several last minute visits and even declared victory in a state that was prohibited to campaign in by the democratic party)
The Republican ones only count for half off the delegates. But I'm not talking in terms of the delegates earned from Florida, I'm talking about how a win here will affect the primaries in other states, and the success of the candidates' campaigns themselves.
And they said it was prohibited to campaign (and this I was thankful for, because the streets were so deliciously clean in the weeks leading up to this day), I still saw my fair share of fliers and signs and whatnot. And, I mean, to quote some random news anchor, "These people sure as hell didn't have them hanging around in their closets". Though the amount of campaigning has been quite low, the candidates (or, at least, their supporters) haven't exactly stayed true to their word.