FiveThirtyEight.com: the Undecideds

FiveThirtyEight.com: Electoral Projections Done Right: "Related to this is the fact that there are now very, very few true undecideds left in this race. After accounting for a third-party vote, which looks as though it will come in at an aggregate of 2 percent or so (after doing some work on this tonight, I concluded that I had been slightly underestimating the third-party vote before), I am showing only about 2.7 percent of the electorate left to allocate between the two major-party candidates. Even if John McCain were to win 70 perecnt of the remaining undecideds (which I don't think is likely), that would only be worth a net of about a point for him. Frankly, McCain's winning scenarios mainly involve the polls having been wrong in the first place -- because of a Bradley Effect or something else. It is unlikely that the polls will 'tighten' substantially further -- especially when Obama already has over 50 percent of the vote."

Here is the beginning of my post. And here is the rest of it.