Mount Pleasant, S.C. — Forecasting tight elections a few hours before results come in might as well be South Carolina’s official sport. But it’s still hard to resist throwing data out there for analysis. So here’s a bit: A Republican political operative from the state tells me that turnout in Dorchester County is currently at about 14 percent, and that the Republican bean-counters expect it to reach 20 percent by 7 p.m. Eastern. They say strong Republican precincts in that county have turnout that’s slightly above the county average. And in Mount Pleasant, a Charleston suburb that should be a stronghold for Mark Sanford, the former GOP governor, turnout is also high. That’s all good news for Sanford. But I’ll temper this with a reminder that it’s a special election here and it’s still anyone’s game.