To answer your question as to how GWB could have been elected:

GWB is a mere puppet, under the effective control of a clique of people with a far-reaching agenda. He does what he is advised to do (flattering & fooling himself by thinking that he is "the decider", when in fact he is "the manipulated one"), and says (approximately) what he is advised to say.

The U.S. voting public is manipulated by media propaganda.

All bush had to do to get elected was exactly what he was told to do by his 'advisers', having to much intelligence would have been an impediment.

It's harder to blindly follow orders when you think about stuff.