They haven't said so specifically, but I saw a note (without any link) on the antiwar.com blog, so I searched and this article comes up. Only three candidates meet the criteria, but are they going to make exceptions?
It looks like they just want a beauty contest. If anyone knows the best contact for Fox News and/or the SC party to stop this outrage, please post a comment. For now we might contact Fox News and the SC Republican party.