As conscientious followers of politics are doubtless aware, the better sort of American liberal is troubled by the unprecedented vituperation that has stolen into the public discourse. The Clintons refer to it as "The Politics of Personal Destruction" -- well said, Bill and Hillary. They, and concerned citizens like them, recognize that this inflammatory rhetoric comes, in the main, from the right -- or as they put it, "the extreme right." Dr. Howard Dean, chairman of the Democratic National Committee, likewise is alarmed by the abusiveness from the right or more generally from Republicans whom he has recently identified as...