"What's Romney's approach? 'I look like a businessman, I talk like one, I know how to balance budgets, vote for me and people will be so elated that I'm elected that you will get 12 million jobs,'" Clinton said.
He said simply: "Obama's policies are working."
A Romney campaign spokesman, Jeff Bechdel, said Clinton was dispatched to Florida "in a desperate attempt to make up for lost ground."
The former president was hoarse from a hectic campaign schedule as one of Obama's top surrogates.
In St. Petersburg, former Florida Gov. Charlie Crist — a Republican who has since endorsed Obama — introduced Clinton, saying that he was "one of our greatest presidents ever."
Associated Press writer Gary Fineout contributed to this report from Palm BaY. Follow Matt Sedensky on Twitter at http://twitter.com/sedensky