How Predictive Are Iowa And New Hampshire?

Iowa and New Hampshire get a lot of attention, but their records in picking presidents, let alone nominees, is spotty (as you can see from the chart above). But that doesn't mean the states don't matter. They have been effective at weeding the field of candidates, and they're about momentum for those later states.

Plus, in the last 40 years, just one person has gone on to win the presidency after losing both I