he's tapped into something else. there's a group saying this isn't the america i know. >> you are talking about ben carson, in a decline right now. ted cruz is growing. >> that's one poll. it's ours and it's interesting. let's see if it's a movement. >> broadly it appears he's gaining strength. here's what he said this morning as he filled that vacuum a little bit in response to donald trump. take a listen. >> senator, your reaction to donald trump's suggestion yesterday that muslims be tracked as part of a national registry? >> well, listen, i'm a big fan of donald trump's but i'm not a fan of government registries of american citizens. the first amendment protects religious liberty. >> clear that ted cruz has a calculation here as well. doesn't want to alienate trump supporters because if trump disappears, he hopes he's the biggest one with the inheritance. >> cruz has been very hesitant to criticize trump on any of this over the top rhetoric trump has used. that's as close as you will come