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Justice Roberts joins court’s liberals in upholding health care law

04:57

The blockbuster decision was one of the court’s most important rulings in decades. Opponents of the law had said Congress’ power to regulate commerce didn’t extend to people who choose not to buy something, something that the court’s conservatives agreed with. Justice John Roberts did decide, however, that the law was a legitimate use of the congressional power to tax. NBC’s Pete Williams reports.