From almost the moment Saturday Night Live first aired, the media swooned at the sight of Chevy Chase. New York magazine slapped him on the cover, declaring he was the next Johnny Carson. He did an op-ed for the New York Times, in which he introduced himselfas: Chevy Chase is Chevy Chase and youre not. All throughout 1975,the cleft chin was everywhere. Then, in an interview with Vogue, a moment of introspection struck....