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Steven Senne, Associated Press
Republican presidential candidate, former Massachusetts Gov. Mitt Romney addresses an audience during a campaign stop at an American Legion post in Arbutus, Md., Wednesday, March 21, 2012.

METAIRIE, La. — Republican presidential candidate Mitt Romney says he would repeal President Barack Obama's signature health care law and instead let states implement different programs.

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Romney told voters in Louisiana on Friday that the law dubbed "Obamacare" by Republicans tramples on economic freedom and will drive up costs.

Romney focused on health care because Friday is the second anniversary of the law's enactment. Also next week, the Supreme Court is scheduled to hear arguments on the law's constitutionality. A major sticking point is the law's requirement that all Americans buy health insurance.

As governor of Massachusetts, Romney signed a state health care law that required all residents to buy insurance.

Louisiana's Republican presidential primary is Saturday.