. >> two ads, one sound bite, one scathing message from our gary tuchman. >> reporter: chris christie with a campaign stop at a pizza place in new hampshire. no matter how you slice it, he's got some work to do. >> thank you all for coming today. >> reporter: to be competitive in the granite state. he's made a conscious decision to criticize marco rubio. some of his supporters have no problems with making rubio a target. >> we think christie by talking negatively about rubio is a good strategy for him?