Useful Lesson

Remember all that talk about how Iowa was impossible to poll, because it was a caucus and turnout was unpredictable? Well, it turned out that surprising and much-maligned Des Moines Register poll the weekend before was pretty darn close to the mark. Meanwhile, New Hampshire, a primary state, should have been a snap. But it completely confounded the pollsters, convincing even the Clinton forces that she was headed for a double-digit defeat.