Florida and Michigan are too important (18,000,000 citizens in Florida). The national Democratic leadership will have to back down, or, as Bee-... says, increase the Republican vote in these and other key states. Florida probably will vote Republican, but Clinton has the best chance of changing that.

Clinton was the obvious choice, just as McCain was the obvious choice for Republicans (was support from Crist essential?- dunno).

Hispanics (Cuban segment large in this case, the vote not representative of Hispanic preferences elsewhere), some 20%, supported Clinton 2-1 and on the Republican side, preferred McCain.
The Hispanic vote is more important than numbers indicate, since they own 17% of businesses, including a couple of large banks).
The black Demo vote was 70% for Obama, echoing SC, but their numbers (15%) and economic power (own only 6.6% of businesses) are too small to be reflected in any but a close vote.

The Florida tax cut proposal passed overwhelmingly, despite opposition from teachers, firefighters, and some economic groups (seventy percent home ownership in the State).
The 'portability' provision, allowing home owners to transfer the saving to a new house, is under attack, and a suit has been brought.

Miami Herald
Demographic information from US Census Bureau.