campaign ad. >> i'll use my own server. >> if the media wants to attack and ridicule every republican, that's what they're going to do. but leave our kids alone. >> reporter: ben carson's support is slipping and now new reports of a campaign shake-up, carson telling nbc news he's streamlining some staff assignments, but insisting his senior aides will stick around and so will he. >> i'm not a quitter by any stretch of the imagination. >> reporter: the next few days, all quiet on the campaign trail as candidates take their own christmas breaks. jeb bush doing last-minute shopping and considering what holiday cards he still might send. >> what if you sent donald trump a christmas card? what would it say? >> this time of year? i hope he has a wonderful time off. >> reporter: so even the candidates getting into a little bit of the holiday spirit. all of them down for the next couple of days. but back on the trail next week. donald trump will be hitting three early states in three days, iowa, new hampshire, south