UNDATED (AP) - Health care has grabbed the spotlight in the presidential campaign today.

Mitt Romney said if elected he would retain some popular parts of the new health care law he has pledged to repeal, while President Barack Obama focused attention on the Republican ticket's stand on Medicare.

Obama was campaigning in Florida, where he pointed to study that found future retirees would pay tens of thousands more for health care under Romney's plan. The report was rejected quickly by Romney's campaign.

Obama told about 3,000 supporters in Melbourne that if Romney had his way, Americans would pay more so insurers could make more.

Romney told NBC's "Meet the Press" that he would replace Obama's health overhaul with a plan entirely his own, yet would keep some popular provisions. In an interview recorded Friday and Saturday, Romney said he would make sure that people with pre-existing conditions could get coverage. He also said he would allow young adults to keep their coverage under their parents' health-insurance.

Romney was in Boston, preparing for the upcoming debates.