President Obama made the case for health coverage at Faneuil Hall in Boston in late October, a few weeks after enrollment opened for health insurance sold on exchanges created under the Affordable Care Act. Jewel Samad/AFP/Getty Images hide caption

itoggle caption Jewel Samad/AFP/Getty Images

Massachusetts Gov. Mitt Romney signed a 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. Joe Raedle/Getty Images hide caption

itoggle caption Joe Raedle/Getty Images

Governor Deval Patrick of Massachusetts signed the law enacting the state's latest phase of health care on August 6, 2012. Eric Haynes/Governor Deval Patrick's Office hide caption

itoggle caption Eric Haynes/Governor Deval Patrick's Office

The price for an X-ray is murkier than the image. Ivica Kljucar/iStockphoto.com hide caption

itoggle caption Ivica Kljucar/iStockphoto.com

Then-Gov. Mitt Romney signs the Massachusetts health care bill in Boston on April 12, 2006. Brian Snyder/Reuters/Landov hide caption

itoggle caption Brian Snyder/Reuters/Landov

Gubernatorial hopeful Dr. Donald Berwick speaks at the Massachusetts Democratic Party Platform Convention in July. Aram Boghosian/Boston Globe via Getty Images hide caption

itoggle caption Aram Boghosian/Boston Globe via Getty Images

John Kelly and Dr. Marcia Angell were advocates on opposing sides of a Massachusetts measure to legalize physician-assisted suicide. Jesse Costa/Jesse Costa/WBUR hide caption

itoggle caption Jesse Costa/Jesse Costa/WBUR

Matthew Spencer receives intravenous infusions of a potent antifungal drug at home twice a day for an indefinite period to treat a suspected case of fungal infection linked to a contaminated steroid drug that came from New England Compounding Center in Massachusetts. Richard Knox/NPR hide caption

itoggle caption Richard Knox/NPR

Massachusetts Senate candidate Elizabeth Warren is shown here attending a 2010 Capitol Hill hearing on the Troubled Asset Relief Program. Alex Wong/Getty Images hide caption

itoggle caption Alex Wong/Getty Images