ORLANDO, Fla. (AP) — President Barack Obama is unleashing a new Medicare offensive against rival Mitt Romney, eager to shake his Republican challenger off his economic focus and turn the campaign to territory more favorable to Democrats.

Campaigning for a second day in Florida, where older voters and workers approaching retirement hold sway, Obama today is expected to highlight a study by a Democratic leaning group that concluded that on average a man or woman retiring at age 65 in 2023, would have to pay $59,500 more for health care over the length of their retirement under Romney's plan. The numbers are even higher for younger Americans who retire later, the study found.

A person who qualifies for Medicare in 2030 — today's 48-year-old — would see an increase of $124,600 in Medicare costs over their retirement period. The study was conducted by David Cutler, a Harvard professor and health policy expert who served in the Clinton administration and was Obama's top health care adviser during the 2008 presidential campaign.

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