If, as he ponders the Threat Matrix at his daily intelligence briefing, Cheney really sees himself as a modern Achilles or Hector on the plains at Troy, he is not just being grandiose. Cheney is often lauded as that rare No. 2 who, having no political ambition for himself, can give his all to the president. But Cheney's aloofness from the ebb and flow of politics and public opinion has apparently dulled his senses in a way that is not helpful to his boss, who has been busy lately defending his administration from criticism that it was badly out of...