Massachusetts Gov. Mitt Romney signs into law a new health care reform bill during an April 12, 2006, ceremony at Faneuil Hall in Boston. The bill made Massachusetts the first state in the country to require that all residents have health insurance and has become a centerpiece of criticisms leveled by Romney's opponents in the 2012 presidential race. Joe Raedle/Getty Images hide caption

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How Health Care Ruling Could Shift The GOP Debate
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Sen. Jim DeMint, R-S.C., center, joins other conservative lawmakers on Capitol Hill to criticize President Obama's health care law on Oct. 5, 2011. They said the boxes were packed with petitions asking Congress to repeal the Affordable Care Act. J. Scott Applewhite/AP hide caption

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White House Preps For Court's Health Care Ruling
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State Of GOP Race: No Momentum For Candidates
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President Obama and first lady Michelle Obama listen as a choir performs during the groundbreaking ceremony for the Smithsonian National Museum of African American History and Culture in Washington, D.C., on Wednesday. Saul Loeb/AFP/Getty Images hide caption

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Obama Takes New Approach To Black Voters For 2012
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Romney Ads Whittle Away At Santorum's Mich. Lead
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Rick Santorum gestures toward Republican rival Mitt Romney during the South Carolina GOP presidential debate in Myrtle Beach on Jan. 16. Charles Dharapak /AFP/Getty Images hide caption

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How Does Mitt Romney Stop Rick Santorum's Rise?
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Republican presidential candidate Mitt Romney speaks to supporters at a rally in Denver on Tuesday. Marc Piscotty/Getty Images hide caption

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Conservatives Worry Romney's Vision Is Cloudy
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Republican presidential candidate Mitt Romney speaks during a campaign rally Wednesday at Brady Industries in Las Vegas. Ethan Miller/Getty Images hide caption

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Romney Again The Front-Runner, But At What Cost?
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Romney Wins Big Over Gingrich In Florida Primary
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Romney, Gingrich Clash During GOP Debate In Tampa
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From left, former Pennsylvania Sen. Rick Santorum, former Massachusetts Gov. Mitt Romney, former House Speaker Newt Gingrich and Texas Rep. Ron Paul, at a debate Thursday in Charleston, S.C. Win McNamee/Getty Images hide caption

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How South Carolina Has Worked Its GOP Crystal Ball
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At Debate, Gingrich Denies He Sought Open Marriage
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S.C. Voters Have 2 Days To Make Up Their Minds
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