Why did Romney Lose Florida?

[pbrower2a]

He also ran an ad linking Obama To Latin American dictators which, uh, didn't help at all.

The ad where Hugo Chávez said he would vote for Obama if he were an American? It should have helped.

It was devastating for Romney that 7.6% swing for Obama in Miami-Dade.

The dirty ad failed. It was too blatant. 

[pbrower2a]

The Mariel boat-lift brought a different group of Cubans than the Cubans who left Cuba soon after the Castro takeover. The Cuban refugees of the early 1960s were as a rule whiter, better-educated, professionals and landowners. The later group of Cubans were not so white, not so well-educated, definitely not landowners, and not connected to existing reactionary politics in America.

But even the Cuban-Americans descended from early refugees are assimilating, often with non-Cuban Hispanics... and many have job classifications (such as teaching) that might overpower other political considerations.