"The more rightists who win G.O.P. primaries, the greater the Democrats’ prospects next year. But the electoral math is less interesting than the pathology of this movement. Its antecedent can be found in the early 1960s, when radical-right hysteria carried some of the same traits we’re seeing now: seething rage, fear of minorities, maniacal contempt for government, and a Freudian tendency to mimic the excesses of political foes."