[quote name='smalien1']Who's yours?
Answer based on politics not personal life (i.e. if you dislike Clinton because of something he did to the country OK but don't mention the BJ)
I say McCarthy
(try to keep it in America, other wise the choice is obvious)[/QUOTE]
Firstly, you could make a convincing argument the BJ and involvement with a White House intern did hurt the country and the office of the presidency, so it's not just personal life. I mean, he did this stuff on the job, not after he left office or before. Personally I don't see this as making him the "worst ever," but to say it can't be a factor is ridiculous.
Secondly, the answer is most certainly not obvious if you include politicians from other countries. Surely you mean Hitler and he's no doubt among the worst, but also surely you can make a good case for plenty of other people, like Stalin, Pol Pot, etc.
McCarthy is not too bad a choice. I'm not sure who I would say. Since you include all politicians, it's easy enough to pick someone who is very extreme and use them. But I would probably go with someone who was/is a pretty major leader because they have more of an effect than just words. For presidents in particular, I would say Richard Nixon and Bill Clinton were the two that brought the most disgrace to the office. Others have done probably lousier jobs, but those two brought disgrace upon the office itself. Maybe McCarthy for non-presidential major figure, although there are plenty to pick from who are less major, for example someone like James Traficant.