Well it must have been just a blip, because McCain won last night on the tracker.
We don't know that yet. You have to be patient and wait at least until Monday because today's sample could be the blip, not the ones around it.
I should note that I was doing my race calculations again, and they confirm to me that the poll is most likely a slight outlier. What's a little odd is that, in comparison to the states around it (Georgia for example), SC black population is actually declining slightly. Also, at least according to the exit poll, turnout was pretty good in 2004 (29.0% black, 30% turnout).
