Obviously Hunter S. Thompson supports Kerry:

Did you see Bush on TV, trying to debate? Jesus, he talked like a donkey with no brains at all. The tide turned early, in Coral Gables, when Bush went belly up less than halfway through his first bout with Kerry, who hammered poor George into jelly. It was pitiful. . . . I almost felt sorry for him, until I heard someone call him "Mister President," and then I felt ashamed.