After yesterday’s heartening arguments, today’s arguments carry even more importance, because it seems likely the Court will actually reach the severability question. If there are political consequences for the Court’s decision on the mandate argued yesterday, there could be even more consequences to today’s arguments. If the law is struck down in its entirety, expect the president to dust off his 2010 State of the Union talking points, which charge the Court with what he calls “judicial activism,” but in reality seem to criticize any court decision that finds a law of his unconstitutional. The justices on both sides seemed...