Bush didn't do any of these things that we know of and he turned out to be the worst President in U.S. history. He was also a failure as Governor of Texas.
We do know that some past presidents have done some pretty ugly things.
I would say that the genocide accomplished under the direction of Bush one while at the CIA was much worse than the things that McCain did and he wasn't the royal screwup his son is.
It's actually pretty hard for me to imagine anyone being worse than Bush.
Which is probably why Obama has enjoyed the success he has when he hasn't really accomplished much as a senator.
Most people that vote for Obama can't tell you one thing he's accomplished for the good of the people he represents.... BUT There's one thing they do say.... HE HAS TO BE BETTER THAN BUSH!!!!!!!!