bush/mccain mantle is probably going to be the one that will take him to account on. >> rubio has to capitalize on that and talk about the bulk collection of metadata that cruz opposed. >> the past is predictive. he killed it in the debate when he was talking about foreign policy the last time. it gave him a step up. >> let's look at ben carson. people haven't been talking about him as much this week with all of the surging of trump. it says here he must dem straut a command of issues. okay. not appear overwhelmed on foreign policy. that is his achilles heel, maeve. >> yes, the whole debacle with mispronouncing hamas and he's had these series of stumbles on foreign policy, particularly as the news has been eclipsed by the terrorist attacks in paris and in san bernardino. he's just seemed sort of lost in this race. of course there's also the questions about his personal background and he really has to do something tonight to try to regain momentum.