CNNW John King USA December 15, 2011
reiterated his pledge saying, please, republicans should all be nice. here's mr. gingrich, in his own words. >> i only have one opponent, that's barack obama. i have a number of friends running and one opponent. and i'm going to run this campaign on a positive basis because i believe the people of iowa are smart enough that they can see the difference between somebody trying to help the country and somebody who simply is running a negative campaign. >> can he stay positive is the big question because speaker gingrich make no mistake, is feeling the heat. let's bring in cnn's jim acos...