Look. He's got the whole world talking about him, thinking about him. Maybe most of it is negative, but you know what they say: there's no such thing as bad press. The occasional ridiculous verbalism does not automatically make someone stupid. Think about it. I say stupid shit all the time and I was the most sought after student in my Master's degree cohort. The only difference is that I don't have zillions of cameras on me at all times to catch my "Bush-isms."
No. I simply don't believe it's possible to ascend to the top of the most economically and militarily powerful country on the planet (though I don't think they are any more) without at least having the intelligence to recognize intelligence and surround yourself with it.
That said... intelligence is a neutral quality; it does not automatically translate into moral "rightness." George Bush is a bad, bad man.