SC-Winthrop University (pre-debate): Trump +4

[True Federalist (진정한 연방 주의자)]

http://www.winthrop.edu/uploadedFiles/wupoll/Oct2012WinthropPollFindings.pdf

Haven't seen much of their track record. In 2012, they polled SC's 7th district, found GOP up 13. The GOP ended up winning by 11.

They generally do a decent job, and since they use their students to do random digit dialing, they are calling cell phones as well as landlines.  That said I suspect that random chance favored Clinton here and that the sample that was polled was likely ½ to 1 standard deviations too generous to Clinton, which is going to happen from time to time.