Jonathan Rauch of the Brookings Institution, a dear friend and one of the nation’s most insightful and thoughtful political observers, explains in a provocative Atlantic piece “How American Politics Went Insane.” The short answer, more fully elaborated in Jonathan’s earlier e-book, is disintermediation—that is, the demolition of political structures and mechanisms that, in a system of divided powers, make politics work and enable “middlemen” and power brokers to protect the system against crazies. Primaries and campaign finance reforms have weakened the parties. The destruction of the seniority and committee system has disabled Congress from legislating even when a (latent) consensus does exist. “Open government” reforms have constricted the space that is needed for political bargaining. The “pork” that once greased the system has mostly disappeared. Over time, the institutional immune system has collapsed. The ensuing chaos has produced further public disaffection and populist agitation against “the establishment.” It’s a feedback loop, and not a good one.