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Mitt Romney disclosed on Sunday that he would keep several important parts of Barack Obama's overhaul of the American health care system, altering earlier vows for a blanket repeal of the president's most significant legislative achievement.

Romney suggest he would keep provision related to pre-existing conditions and young people.

"I say we're going to replace Obamacare. And I'm replacing it with my own plan," Romney said. "And even in Massachusetts when I was governor, our plan there deals with pre-existing conditions and with young people."

Those are two of the most popular provisions in the hard-fought Obama overhaul, and Romney adopted them in an interview aired on NBC television's "Meet the Press" Sunday morning. Obama's overhaul bans insurance companies from refusing to cover people with pre-existing medical conditions and allows young people to remain covered under their parents' plan until age 26.

"Of course there are a number of things that I like in health care reform that I'm going to put in place," he said. `'One is to make sure that those with pre-existing conditions can get coverage."

Romney also moved to blunt Obama's attacks on the former Massachusetts governor's plans for further cutting taxes, saying his proposals would pay for cuts in overall tax rates by closing loopholes for high income taxpayers.

"We're not going to have high-income people pay less of the tax burden than they pay today. That's not what's going to happen," he said, responding to Democratic claims that Romney's plan would result in even more tax cuts for the millionaires like himself.

When pressed, however, Romney declined to provide an example of a loophole he would close.

While Obama was continuing his two-day, post-convention swing through Florida, Romney headed to church in Boston on a day off from campaigning.