FILE - In this Jan. 27, 2010 file photo, President Barack Obama greets Chief Justice John Roberts before he delivered his State of the Union Address on Capitol Hill in Washington. Break

 

              FILE - In this Jan. 27, 2010 file photo, President Barack Obama greets Chief Justice John Roberts before he delivered his State of the Union Address on Capitol Hill in Washington. Break
FILE - In this Jan. 27, 2010 file photo, President Barack Obama greets Chief Justice John Roberts before he delivered his State of the Union Address on Capitol Hill in Washington. Breaking with the court's other conservative justices, Roberts announced the judgment that allows the law to go forward with its aim of covering more than 30 million uninsured Americans. Roberts explained at length the court's view of the mandate as a valid exercise of Congress' authority to "lay and collect taxes." The administration estimates that roughly 4 million people will pay the penalty rather than buy insurance. (AP Photo/Charles Dharapak, File)