Trust in government and journalism has plummeted in recent decades, particularly among conservatives. This wasn't a coincidence, nor strictly a result of bad behavior on the part of elected officials or the press, says Thomas Mann, a senior fellow at the Brookings Institution and co-author of "It's Even Worse Than It Was: How the American Constitutional System Collided with the New Politics of Extremism." He argues that understanding how we got here just might help Americans move to a better place.