polls. it s very difficult for a niche brand proposition, the revolution is not a widely embraced proposition for a brand. it s very difficult to break out and push a niche brand into a widely popular position when you stake out that territory. bernie sanders has made a strong brand play, has made it almost in some ways more difficult for him to break out. that s an interesting assessment. martha, thank you very much. david gergen, thank you very much. happy almost 2016. we ll have a lot more about all of these candidates to talk about in the new year, no question. coming up, we re going to introduce you to the man behind the only republican woman running for president. our dana bash s candidate interview with carly fiorina s husband frank. what the would-be first gentleman is revealing about her campaign next.