Parliament of Whores by PJ O’Rourke. There can be few contemporary writers with more epigones than O’Rourke. Just about every newspaper has one these days (for a while, the AFR had two), and the blogosphere is full of variants on the same riff.
O’Rourke himself was a lot funnier in his National Lampoon days, satirising the Left, not exactly from within, but at least from close-up, than he is as a fully paid-up Republican party animal. Still he can always raise a laugh, which is more than can be said for most of his imitators.