. >> 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

. >> 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?

the publisher of the union leader said young rubio must make new hampshire a bunch of rubes. he hasn't spent much time here but is trying to sell himself with tv ads as someone who can go to washington to clean up the washington mess. meanwhile, ben carson won't let up on ted cruz for what carson aides call dirty tricks, sending this e-mail erroneously suggesting carson may drop out. cruz has apologized but carson isn't satisfied, telling buzzfeed not to take corrective action is tacitly saying it's okay or like hillary clinton said after benghazi, what difference does it make. carson said it doesn't rise to