As Nate Silver complains about often, there just aren't that many presidential elections since 1960, it's way to easy to build some overfitted model that seems

As Nate Silver complains about often, there just aren't that many presidential elections since 1960, it's way to easy to build some overfitted model that seems accurate. As another comment mentions, we could all just build a nth-order polynomial to achieve a 100% accurate prediction on previous data.