CAYCE -- On a recent Thursday evening, the South Carolina Democrat sharing the top of state ballots with Barack Obama strode through a restaurant parking lot where the bumper stickers featured the presidential candidacies of Ron Paul, Bob Barr and Chuck Baldwin. Inside the family eatery just outside Columbia, a mix of independents, Democrats, Republicans, Libertarians and Constitution Party members waited. A smattering of members of Southern heritage groups were in attendance. Copies of "Free the South: A Blueprint for Peaceful and Legal Secession," rested on a couple of tables. In a year when South Carolina voter registration shot up...