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
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
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
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