The U.S. Supreme Court agreed Monday to hear a constitutional challenge of President Barack Obama’s hard-fought health care reform package. The challenge hinges on whether the legislation breaches the individual rights of American citizens by forcing them to carry health insurance. The law, dubbed ‘Obamacare’ in the media, stipulates that, starting in 2014, individuals without health coverage will be forced to but it or pay a penalty. The challenge was brought forward by governors and attorneys general from 26 U.S. states, the National Federation of Independent business and two individual plaintiffs. The court will begin hearing arguments next March, paving the way for an election-year showdown over a piece of legislation championed as a major achievement by the Obama administration.