About 70% of the respondents indicated that they are still undecided, and about 68% indicated that they may change their mind before election about whom they will support.
So it would seem that this poll hits on the general main-stream media audience that's been following the news, albeit the filtered and distorted news. Ron's support is VERY uneven geographically in SC, so if this was a geographically even sample, this could be the reason for the low number.
The one recent poll from SC has us in the double digits, so Ron's true support sounds incredibly difficult to sample.