As the Republicans hit the trail today for a last burst of campaigning before Tuesday's Florida primary, President Obama's campaign suggests they've dug themselves into a ditch with Hispanic voters.

The memo from Sergio Bendixen, the Miami-based pollster for Obama for America and Gabriela Domenzain, Hispanic press director, says that the latest polling suggests Mitt Romney and Newt Gingrich, "may very well have already sealed the political fate of their party with the Hispanic electorate – the fastest growing voting bloc in the country.

The pair cite the latest national Univision/Latino Decisions poll of Hispanic voters and says it "clearly indicates the weak position Mitt Romney and Newt Gingrich are in with Hispanic voters, and how much of an advantage Barack Obama will have over them in the general election.

"According to the survey, the President has a 72 percent favorability rating among all Hispanic voters and a 25% unfavorability rating. Mitt Romney and Newt Gingrich are both deep underwater, at 28/41 and 24/44, respectively."