“The Supreme Court on Monday agreed to hear a challenge to the 2010 health care overhaul law, President Obama’s signature legislative achievement, setting the stage for oral arguments by March and a decision in late June as the 2012 presidential campaign enters its crucial final months… The court scheduled five and a half hours of arguments instead of the usual one, a testament to the importance of the case, and the court’s ruling a few months later will present opportunities and challenges for the presidential contenders as well as for candidates in the battle for control of Congress.”