Article Photos: Sanford advances in SC race, Colbert's sister wins 1/3

Elizabeth Colbert Bush, the sister of comedian Stephen Colbert, shares a laugh with reporters after voting in  Mount Pleasant, S.C., on Tuesday, March 19, 2013. Colbert Bush is one of two Democrats running Tuesday in the Democratic primary in a special election to fill South Carolina's vacant 1st Congressional District seat.    (AP Photo/Bruce Smith).