Mitt Romney

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With the U.S. Capitol in the background, Republican presidential candidate and former Massachusetts Gov. Mitt Romney speaks about the Supreme Court's health care ruling on June 28, 2012. (Associated Press)

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** FILE ** GOP presidential hopeful Mitt Romney has said, " If I am elected president, we are going to get rid of Obamacare and replace it with real reform." (Associated Press)

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Republican presidential candidate Mitt Romney makes his pitch Tuesday at Carter Machinery Company Inc., in Salem, Va. Now he's facing calls for more specifics on policies. (Associated Press)

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Republican presidential candidate Mitt Romney signs autographs while campaigning Tuesday at Carter Machinery Company Inc., in Salem, Va. As he moves closer to official nomination, Mr. Romney is being pressed for more specifics on key issues such as immigration, health care and women's pay, as well as fixing the economy. (Associated Press)

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Gonzalo Hernandez stands outside a Scottsdale, Ariz., resort Monday protesting GOP presidential hopeful Mitt Romney, who was speaking inside, and Arizona's immigration law, a key part of which was upheld by the Supreme Court. (Associated Press)

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A federal court decision has created the possibility that some public television and radio stations that are perpetually strapped for cash could see a windfall from political advertising this fall from President Obama (seen here) and likely Republican opponent Mitt Romney. (Associated Press)

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A federal court decision has created the possibility that some public television and radio stations that are perpetually strapped for cash could see a windfall from political advertising this fall from President Obama and likely Republican opponent Mitt Romney (seen here). (Associated Press)

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Shannon Westfield, 20, (left) and Jane Kernan, 16, make calls for Mitt Romney in Fairfax wearing T-shirts with a QR code that voters can zap with their smartphones to learn more about the GOP presidential hopeful. In May, Mr. Romney's fundraising almost matched President Obama's, taking in $58 million. (Associated Press)

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Republican presidential candidate Mitt Romney (right), campaigning with Sen. Marco Rubio of Florida, talks to reporters in Aston, Pa., in April 2012. (Associated Press) ** FILE **