From the Left to the Right, there's a loss of confidence in political institutions: not just the Congress any more, but also the Presidency and the US Supreme Court. But there's disagreement about whether that's good or bad. After all, Thomas Jefferson wanted a revolution every 20 years. Nobody's predicting that, but is democracy at risk when so many people don't believe their government can address their problems? Is this the challenge facing both Democrats and Republicans in this election year?