Here's a possibly goofy way to think about what's happening in the Democratic primary right now:

Most people can’t make such a painful choice, not even the students at a bastion of rationality like the Massachusetts Institute of Technology, where Dr. Ariely is a professor of behavioral economics. In a series of experiments, hundreds of students could not bear to let their options vanish, even though it was obviously a dumb strategy....

On the other side of the coin, my relative in Ohio confesses she voted for Hillary--despite slightly preferring Obama--because she's so hooked on the drama of the race and doesn't want to see it end.

--Michael Crowley