I’ve followed politics in the USA since G.W. Bush was elected a second time in 2004. I had one question:

Why are so many Americans so stupid?

And why are Americans so close to a 50/50 split in so many elections.

Here’s one possible explanation. Many, MANY make a lot of money when American elections are close: lobbyists, consultants, media, broadcasters. They have incentive to try to keep it close.

Freakonomics audiocast:

Some say the Republicans and Democrats constitute a wildly successful industry that has colluded to kill off competition, stifle reform, and drive the country apart.

America’s Hidden Duopoly (Ep. 356)