You can get agreement from almost all points on the political spectrum that the worst aspect of our political system is the presidential nomination process. It is perhaps no coincidence that it is the one part of the system not treated in the Constitution. That’s because the Founding Fathers abhorred political parties and hoped that presidents would be selected by something like an elite consensus. But we have political parties, the oldest and third-oldest in the world, and they are not going away. Surely a better system is possible. The current system of primaries, caucuses, and national conventions is the...