Who Let the Dogs In? takes us through two decades of political life, from Ronald Reagan, through Big George and Bill Clinton, to our current top dog, known to Ivins readers simply as Dubya. But those are just a few of the political animals who are honored and skewered for our amusement. Ivins also writes hilariously, perceptively, and at times witheringly of John Ashcroft, Dick Cheney, Donald Rumsfeld, H. Ross Perot, Tom DeLay, Ann Richards, Al Gore, Jimmy Carter, and the current governor of Tex