I think SC has an OPEN PRIMARY which means democrats (dead and alive) and independents can vote.
So the Paul and Romney votes will pile on.To spoil any conservative from winning.
The vast majority of SC democrats are black. They won’t crossover and vote. The few white libs that do crossover will vote for Paul. This isn’t Iowa or New Hampshire. I don’t think the number of democrats voting will have a significant impact, other than boosting Ron Paul a few percentage points.