The idea of a liberal elite is not intellectually robust. It's never been enunciated with anything approaching scholarly rigor, it has been refuted countless times, and it falls apart under any sort of systematic scrutiny.Yet the idea persists. It did not die with Richard Nixon or peter out with the busing controversy or depart the national scene with the wily Bill Clinton. Indeed, it has greater currency on the street today than do twenty years' worth of blue-ribbon studies and a lifetime of responsible sociology.