A question that seems to be on everybody's mind these days turns out to be: Is George Bush the worst President in American history? But how do you judge? Is he the most morally disgusting? The worst mangler of the English language? Ever since the atom bomb was dropped, we've had a whole string of bozos who cannot pronounce the word "nuclear." How much should that count against them? Is John Tyler, our tenth President, a candidate for worst President? Some people who have never heard of this guy have heard of the campaign slogan "Tippecanoe and Tyler, Too." Well,...