someone who has tremendous potential, tremendous gifts. >> i guess it's hard to say they're accomplishments. i'll ask it one more time. >> list one accomplishment that marco rubio has achieved in four years in the united states senate. >> jeb bush ran florida. marco rubio finished a sentence. >> a guy who has been able to, number one -- >> bottom line is, there isn't a whole lot of accomplishments, and i just don't think it's a fair question. >> i'm jeb bush, and i approve this message. >> 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?