Former House Speaker Newt Gingrich and his wife, Callista, greet supporters during a presidential campaign stop in Manchester, N.H., on Wednesday, Dec. 21, 2011. (AP Photo/Charles Krupa)

Photo by: Charles Krupa

Former House Speaker Newt Gingrich and his wife, Callista, greet supporters during a presidential campaign stop in Manchester, N.H., on Wednesday, Dec. 21, 2011. (AP Photo/Charles Krupa)