South Dakota, Nielson Brothers Polling : Romney 49 Obama 43

[Stranger in a strange land]

There was a similar poll from August of 2008 or so that had McCain only ahead by a few points. It returned to normal after the Palin pick, but before the Lehman collapse.

That's because undecideds in the Dakotas are undecided about whether or not they'll vote Republican, not about whether they'll vote Republican or Democratic. Romney's obviously going to win here, though Obama will avoid getting blown out the way Kerry and Gore were.