George Bush has been diagnosed with Dementia

If you ever wondered how a bumbling, illiterate, uneducated person got to be President, then you may want to watch this video. Because in reality George Bush is a Harvard graduate, who is well spoken, and quick thinker, capable of verbally competing against anyone in an argument. But why do we not know this person I just described as our President? Does he have a medical condition, that has caused the decline of his capabilities? Does he have Dementia? This video says he does: