Former House Speaker Newt Gingrich, who won the South Carolina Republican presidential primary, laughs while speaking during a victory party on Saturday, Jan. 21, 2012, in Columbia, S.C. (AP Photo/Matt Rourke)

Photo by: Matt Rourke

Former House Speaker Newt Gingrich, who won the South Carolina Republican presidential primary, laughs while speaking during a victory party on Saturday, Jan. 21, 2012, in Columbia, S.C. (AP Photo/Matt Rourke)