Bush has the focus of a gnat at times. Although he does know how to stay on message politically, the President doesn't seem to have enough discipline to understand complexities. Seems to me that he'd be more content having to deal in a world of absolutes rather than nuance. Like others have pointed out, a President has to be able to handle many things at the same time and understand any linkages that may exist. When one doesn't care to understand nuance, the details kind of get lost on you. That's how mistakes are made.
