Gingrich says rivals' criticism taking a toll

Republican presidential hopeful, former House Speaker Newt Gingrich, facing, talks with Michael George from Strong American Now while touring C&M Machine Products in Hudson, N.H., Wednesday, June 8, 2011. (AP Photo/Cheryl Senter)

December 18, 2011 7:36:26 AM PST
Newt Gingrich tried to quiet unrelenting campaign criticism that he acknowledged had taken a toll as Mitt Romney stepped up insider attacks Saturday in hopes of regaining front-runner status with the first presidential vote little more than two weeks away.