TALLAHASSEE, Fla. (AP) — President Barack Obama is clinging to a small lead in Florida over Republican challenger Mitt Romney.

A new poll of three key swing states shows Obama leading the former Massachusetts governor 45 percent to 41 percent in a random telephone survey of 1,200 registered Florida voters taken between June 19 and June 25. The survey's margin of error was 2.8 percentage points. Obama had larger leads over his opponent in both Ohio and Pennsylvania.

Obama's strongest support among Florida voters comes from young voters and minorities. He opened up a 56-32 advantage over Romney among Florida's growing number of Hispanic voters.

Florida is the largest swing state in the nation with 29 electoral votes. Obama won the state by 250,000 votes in 2008 in his victory over Republican John McCain.