A new poll finds the race for the White House in that key state too close to call.
Mitt Romney tried to break the tie Thursday with a detailed energy plan.
Romney vowed to rewrite tougher Obama regulations on natural gas fracking, drilling in Alaska
and on off-shore rigs.
Romney claims those regulations keep output lower in favor of renewable energy.
"I like wind and solar like the next person, but I don't want the law to be used to stop the production of oil and gas and coal," he told supporters in New Mexico.
In a new Obama ad former President Bill Clinton warns against any Romney rollbacks of Obama policy.
"The Republican plan is to cut more taxes on upper income people and go back to deregulation. That's what got us in trouble in the first place," Clinton says.
Romney's convention in Tampa is being threatened by Tropical Storm Isaac, and Florida's the center of the political storm as well.
It's the biggest swing state, and a new poll shows President Obama down two points at 49 percent, with Romney up one, to 46 percent.
Democrats hope Romney's pick of Paul Ryan will raise Florida seniors' fears of Medicare cuts, but the Quinnipiac polls found it's the economy that matters most to Florida voters of all ages.
Health care ranks second, with Medicare third.