Photo: Barack Obama on primary day in Columbia, S.C. during a visit to Harper's Restaurant

Democratic Presidential candidate Barack Obama (D-IL) greets a kitchen worker during his visit to Harper's Restaurant in Columbia, South Carolina, January 26, 2008, the day of South Carolina's Presidential Primary. REUTERS/Jason Reed


Democratic presidential hopeful Sen. Barack Obama, D-Ill., talks with employees Harper's Restaurant as he campaigns in Columbia, S.C., Saturday, Jan. 26, 2008.
(AP Photo/Charles Rex Arbogast)


Democratic Presidential candidate Barack Obama (D-IL) greet diners during his visit to Harper's Restaurant in Columbia, South Carolina, January 26, 2008. (Jason Reed/Reuters)


U.S. Democratic Presidential candidate Barack Obama holds a baby during his visit to Harper's Restaurant in Columbia, South Carolina, January 26, 2008, the day of South Carolina's Presidential Primary. REUTERS/Jason Reed


Senator Barack Obama is silhouetted as he campaigns in Harper's Restaurant in Columbia, South Carolina, January 26th, 2008. (AP Photo/Charles Rex Arbogast)