Former House Speaker and current Republican presidential hopeful Newt Gingrich and his wife, Callista, at one point owed as much as a half-million dollars to jeweler Tiffany & Co., as revealed in financial disclosures filed by Mrs. Gingrich. (Associated Press)

Former House Speaker and current Republican presidential hopeful Newt Gingrich and his wife, Callista, at one point owed as much as a half-million dollars to jeweler Tiffany & Co., as revealed in financial disclosures filed by Mrs. Gingrich. (Associated Press)