Election campaigns ought to be serious occasions in the life of a democratic polity. For citizens of a democracy, an election is a time to take stock-to reexamine our beliefs; to review our understanding of our own interests; to ponder the place of those interests in the larger social order; and to contemplate, and if necessary to revise, our understanding of how our commitments are best translated into governmental policy-or so we profess to believe.

Americans, however, are haunted by the fear that our election campaigns fall far short of the ideal to which we aspire. The typical modern...