"Yankee Doodle Dandy" was a very uncomplimentary song that was adopted by British surgeon Richard Schuckburgh to poke fun at the American colonists during the French and Indian wars. It was then used by the British against the Americans in the Revolutionary war, until the Americans took it up as their own. Why was the song uncomplimentary: a doodle is an idiot, and the line about Yankee Doodle sticking a feather in his had and calling it "macaroni" (a fancy Italian way of dressing) illustrated that Americans were unsophisticated country bumpkins. But it was adopted by the colonists because they were proud of this very unsophistication. This pride lives on to this day, and GW Bush is a very good embodiment of this pride.
http://bensguide.gpo.gov/3-5/symbols/yankee.htmlOnly 7% of people in the national exit poll on cnn.com thought intelligence the most important factor for President.
One more reason to understand why Bush won (or was even competitive).