Of all the candidates on the stage, by far the least specific and substantive is Mike Huckabee, who offers bland generalities with sweet rhetoric. His candidacy therefore poses an interesting question: Does substance matter? Since 1992, when Bill Clinton proudly displayed his book-length list of solutions to every problem under the sun, candidates in both parties have become policy wonks full of deadly-dull detail about their proposals (and that includes George W. Bush, who loves to throw around numbers in his press conferences). Huckabee offers a new model of vagueness. If it is seen to work, watch for presidential candidates here on in to go for the music and ditch the lyrics.