Democratic presidential hopeful Sen. Barack Obama, D-Ill., arrives on a foggy day for a town hall meeting on the campus of Winthrop University in Rock Hill, S.C., Wednesday, Jan. 23, 2008. (AP Photo/Charles Rex Arbogast)
Democratic presidential hopeful, Sen. Barack Obama, D-Ill., speaks during a town hall meeting on the campus of Winthrop University in Rock Hill, S.C., Wednesday, Jan. 23, 2008.(AP Photo/Charles Rex Arbogast)
Tim Pleasant listens to Democratic presidential hopeful Sen. Barack Obama, D-Ill., speak during a town hall meeting on the campus of Winthrop University in Rock Hill, S.C., Wednesday, Jan. 23, 2008.
(AP Photo/Charles Rex Arbogast)
Democratic presidential hopeful, Sen. Barack Obama, D-Ill., speaks during a town hall meeting on the campus of Winthrop University in Rock Hill, S.C., Wednesday, Jan. 23, 2008. (AP Photo/Charles Rex Arbogast)
Ann Townsend, left, applauds Democratic presidential hopeful, Sen. Barack Obama, D-Ill., during his remarks as she keeps watch over her son, Braxton, at a town hall meeting on the campus of Winthrop University in Rock Hill, S.C., Wednesday, Jan. 23, 2008. (AP Photo/Charles Rex Arbogast)
Democratic presidential hopeful Sen. Barack Obama, D-Ill., guarded by two Secret Service agents, right, works the rope line after speaking at a town hall meeting on the campus of Winthrop University in Rock Hill, S.C., Wednesday, Jan. 23, 2008. (AP Photo/Charles Rex Arbogast)