“One of the two major parties, the Republican Party, has become an insurgent outlier — ideologically extreme; contemptuous of the inherited social and economic policy regime; scornful of compromise; unpersuaded by conventional understanding of facts, evidence and science; and dismissive of the legitimacy of its political opposition.”–Thomas Mann and Norman Ornstein. It’s Even Worse Than It Looks: How the American Constitutional System Collided With the New Politics of Extremism (2012)