That is not a good sign, nor does it make any damm sense.
It does make a bit of sense to me. A> McCain called his handlers and sent word for this to happen B> The majority, in exit polls, of Huckabee’s supporters list McCain as second choice. I suspect the same is true in the other direction.
The way I see it based on the dynamics of the voting so far:
Huckabee drops out and McCain walks away with it
McCain drops out and Huckabee likely wins
Romney drops out and Huckabee has a shot at winning.