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Jim Cole, Associated Press
Former Massachusetts Gov. Mitt Romney, center, and his wife, Ann, are greeted Saturday, March 5, 2011, in Bartlett, N.H. Romney was the keynote speaker at the Carroll County Republican Committee Lincoln Day Dinner.

BARTLETT, N.H. — Republican presidential hopeful Mitt Romney is addressing a political vulnerability in the lead-up to a likely campaign.

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Romney on Saturday described President Barack Obama's health care law — modeled after one the ex-governor signed in Massachusetts — as a misguided effort to seize more power for Washington.

Romney vowed to repeal it if he were ever in a position to do so. Then, raising the Massachusetts law, Romney argued that the solution for the unique problems of one state isn't the right prescription for the nation as a whole.

And with that, he used his appearance before New Hampshire Republicans in the town of Bartlett to start addressing head-on the issue that's certain to be a hurdle in his all-but-certain presidential campaign.