Of course, that leaves a healthy negative rate of 46%. And Newt Gingrich is the target of much of it. "Slightly more than one in five ads (22 %) aired in South Carolina markets over the past week targeted Gingrich," reports CMAG. Here's one example from the Mitt Romney campaign.
On the other hand, 11% of the ads running in the state painted Romney in a positive light, while 13% tarred him in some fashion. Interestingly, Gingrich had a 12% positive rate, slightly higher than Romney.
Which candidate had the most positive ads being run about him in South Carolina? Rick Santorum, "with 16% of all ads focusing on him in a positive way, and 10% of all ads focusing on him in a negative way."
And Ron Paul and Rick Perry are mostly being ignored by their opponents.