Chris Kromm revisits the potential spoiler.
In a post on Facing South, the executive director of the Institute for Southern Studies notices a trend in the presidential polling in North Carolina:
Libertarian presidential candidate Bob Barr, the former Congressman from Georgia, will be on the ballot in NC (despite the state's enormously restrictive ballot access laws). But most of the polls that showed double-digit leads for McCain in North Carolina didn't include Barr.
Since August, any poll that has included Barr has shown McCain with no more than a six point advantage, or even put Obama in the lead. The last two polls — from PPP (Democratic) and Civitas Institute (Repulican) — include Barr, and they show McCain and Obama exactly tied.
According to Pollster.com, Barr has received between zero and six percent support in polls done since May.
Earlier: Presidential spoilers in N.C. history.

Chris Kromm says the