One can be a bad politician and basically a good person and one can be a great politician and basically a bad person.
I think the US politician who did the most damage to this Country in my lifetime was Jimmy Carter, but 'bama will soon catch up and leave him in the dust. Bush Jr. is definitely nowhere to be found on my favorites list, either.
Nancy Pelosi and Barbara Boxer both win top honors for "most insane." John Kerry is at the top of the liars list and Al Gore and John Edwards each get an award for biggest hypocrites. But if he was a bonafide politician, Jesse Jackson would outrank all of them in every bad category. Maxine Watters takes top honors for "biggest bitch."