Bush was smart. Obama is smart. They are definitely well over 115 IQ, one standard deviation and I'd bet they're both 130 easily. You don't finish the MBA or JD if you're completely stupid.
Now, we can argue either/both of them were murderous, politically misguided, idiotic, evil, selfish, lying, etc... YES, very possible that one or both of them fall under this heading.
But as far as being SMART... as far as IQ, as far as being able to understand complex subects, YES, they are smart people. Everytime I see a high school dropout in the bar saying "Obama is DUMB", I just shake my head... just about everyone at this top level is pretty smart. And the ones who are not, well, we see it pretty quickly. Obama sucks, but his IQ is probably 130 easily, and I'd agree with this for most in Congress, to be honest.