Well, it was said in the beginning of this thread, and I think it warrants saying again - this was one priest in one parish in heavily conservative South Carolina. If you can get a thousand priests, or a dozen bishops, to bar Obama supporters from communion - then I'd be worried.
As it is, it sounds like an isolated idiot.

I saw just about the same headline on the Website of our local television station, and I got concerned because I got the impression it was a local story.

Do they even HAVE Catholics in South Carolina?

Take a look at the article about the priest in the local newspaper where he serves in a downtown parish - GreenvilleOniline.com. Note that the priest said he would not refuse communion to anyone, but thinks that Obama voters should not receive communion. Note also (click) that the priest's superiors appear to have repudiated his statement. The Website of the diocese is here (click). A PDF copy of the statement of the dioces is here.

Like I say, it was one priest in one parish - and his superiors say he was wrong.

-Joe-