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Today’s Polls, 3 AM Edition (11/3)

Barack Obama’s position has become somewhat stronger since our update this afternoon. We now have him with a 5.8 point lead in the national popular vote, and winning the election 96.3 percent of the time. Earlier today, those figures were 5.4 and 93.7, respectively.

I continue to find a hair’s worth of tightening on balance in the state-by-state polls — even as Obama’s position in the national trackers seems to be roughly as strong as it has ever been. This, ironically, is the exact reverse of the position we saw earlier in the week, when the national polls seemed to be tightening even as the state polls weren’t.

However, Obama’s win percentage has ticked upward again for a couple of reasons. Firstly, he’s gotten some relatively good numbers out of Pennsylvania since our last update, with PPP and Zogby giving him leads of 8 and 14 points, respectively, and Rasmussen showing his lead expanding to 6 points after having been at 4 before. (The Zogby poll is probably an outlier, but may serve to balance out outliers like Strategic Vision on the other side).

Secondly, McCain’s clock has simply run out. While there is arguable evidence of a small tightening, there is no evidence of a dramatic tightening of the sort he would need to make Tuesday night interesting.

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.

It’s very late, obviously, so we won’t get into too much more detail, but a couple of quick notes.

–> Don’t worry too much about that SurveyUSA result in Minnesota, which shows Obama just 3 points ahead. SurveyUSA’s polling in Minnesota has been very, very weird all year; they’ve never shown Obama with larger than a 6 point lead in their likely voter model, and had McCain ahead in the state as recently as October 1st. SurveyUSA does not have a Republican lean in general, but in Minnesota, it has consistently had a huge one.

–> A couple of the national polls have now started to predict how undecided voters will behave and allocate them between the two major-party candidates. I use the versions of these surveys before any such allocations are made, as from my point of view it isn’t the pollster’s job to get into the prediction business (our model has its own ideas about how to handle undecideds).

Nate Silver is the founder and editor in chief of FiveThirtyEight.