GOP insiders in South Carolina say that each candidate has worrisome issues . Romney has been seen as too centrist , says poll . He is also viewed unfavorably by a majority of voters who are not affiliated with either major party. Ron Paul 's national security positions keep him out of mainstream , says poll .
GOP insiders in South Carolina say that each candidate has worrisome issues . Romney has been seen as too centrist , says poll . The anti-Romney vote is split between Gingrich and Santorum . Ron Paul 's national security positions keep him out of mainstream , says poll .