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While I have no desire to step into the back-and-forth going on here, I am still human enough to be fascinated by a bad wreck on the highway, so have been reading, and just found one comment of yours very interesting, namely that "...Bush's misdeeds are on the same level as Nixon's..."
I think perhaps reversing that emphasis might serve the facts better. What I mean is that Nixon's misdeeds might be better compared unfavorably to Bush's than the other way around, as Nixon did, at least, in his madness and brilliance (as compared with Bush's arrogance and stupidity) accomplish a few good things while in office, and it was his madness, his paranoid personality, which was his undoing, not trying to prove something to his dad.
As Nixon's craziness became more apparent he was still functioning. I don't think Dubya is anything more than an arrogant, ignorant son of privilege who has used us and the rest of the world to further a totally personal agenda. I'd have more sympathy for him were he totally nuts and brilliant, the two things which defined Nixon.
I know, it's all in the past, but history is at least interesting if not especially helpful.