The question of whether Judge John Roberts is qualified to be chief justice of the United States has been rendered moot by his performance in the Senate Judiciary Committee hearings. He is so obviously -- ridiculously -- well-equipped to lead government's third branch that it is hard to imagine how any Democrats can justify a vote against his confirmation. Start with his intellect. This is a man whose knowledge of constitutional law goes well beyond his intimate familiarity with seemingly every Supreme Court decision. It is rooted in a thorough understanding of American history. He quotes Hamilton in the Federalist...