When it comes to the vagaries of language in American politics, its uses and abuses, its absurdities and ever-shifting nuances, its power to confound, obscure, and occasionally to inspire, William Safire is the language maven we most readily turn to for clarity, guidance, and penetrating, sometimes lacerating, wit. Safire's Political Dictionary is a stem-to-stern updating and expansion of the Language of Politics, which was first published...