I wonder if the issue is the population we are looking at. Are other polls of people in general, and this one focuses on Republicans and independents who lean Republican? That could explain the difference. I still wonder, why Carson? He may be smart, but how does performing surgery on babies qualify one to be president? The advantage I see is that he is strongly anti-abortion, but so are some candidates with relevant experience. We've already had a black president, so the white guilt thing won't get him in, and that sort of thing doesn't seem to work for Republican candidates anyway. The way he talks is kind of boring, too.