1. Because of the Civil War, Americans didn’t elect a President who represented a Southern state from the time of Zachary Taylor’s election (1848) until Lyndon Johnson’s 1964 victory. Major parties nominate candidates they expect to win (with the possible exceptions of Alton B. Parker in 1904 or John W. Davis in 1924, both of whom were nominated by the Democrats because there was seemingly nobody else in the United States belonging to the party at the moment), so major parties largely stayed away from Southern candidates for a century.
2. Florida is third in population now, but there weren’t more than 2 millions people living in Florida until after World War II. Oh, and a sizeable chunk of those people who did live there before then had problems voting because of that whole Southern thing, again.
3. There really hasn’t been a cavalcade of superstar Floridian politicians. (Possibly due to the fact that Florida has proven itself to be pretty terrible when it comes to holding elections and/or counting votes. See: Election, 2000 U.S. Presidential.)
4. If Jeb Bush decides to run in 2016, Florida will probably finally get themselves a major party Presidential nominee.
I’m sure he has loftier ambitions, but if he’s thinking the Presidency, he’s aiming too high. First of all, he’s only been a Democrat for two weeks, so he would have a lot of work to do in order to build a national identity as a Democrat and to win over surrogates or pull Democratic support away from established, lifelong Democrats who might also seek the nomination in 2016.
Plus, he’s only a one-term Governor (elected from a different party) who misjudged his chances at a Senate seat from Florida and sacrificed a second term as Governor to make that bid. If Charlie Crist wants to realize those loftier ambitions, he’s probably going to have to either seek another term as Governor or win a race for the Senate. The Senate would be the best bet for him, but a far tougher race to run than another bid for Governor.