It is likely that the only two names printed on the November 2012 ballot in South Carolina’s state house race, 26th district, will be Libertarian Jeremy Walters and independent Raye Felder. See this story.
No Democrat ran. The Republican, Raye Felder, failed to qualify because of the May 2 decision of the State Supreme Court that disqualified all primary candidates who didn’t file Statements of Economic Interest in March. They had to file using printed forms, and also has to file electronically, and over 200 Republicans and Democrats failed to get on the primary ballots because they did not take both actions by the deadline. However, Felder is petitioning to be on the ballot in the general election as an independent candidate, and her petition will probably succeed.
South Carolina has a straight-ticket device, which injures independent candidates. South Carolina permits write-ins in general elections, so conceivably yet another candidate could emerge as a write-in candidate.