scott walker is the midwestern governor bracket. and jeb bush is the establishment bracket. he really has to crack that first bracket, doesn't he? jerry: he has to make the establishment comfortable enough with him as the alternative to jeb bush. if the front runner stumbles there is a rare amount of comfort among marco rubio among the establishment. al: karen, marco rubio is a first-term senator. his only previous experience was in the state legislature. he is in his 40's. haven't we seen this movie before? the republicans don't like that film. karen: on top of that, the real issue is his role in the senate passing a comprehensive immigration bill. that, for a lot of republicans is a dealbreaker. al: it seems to me, jerry, not only did he create problems, but he has done not a 180, but a 160, if you will. that may put him in the worst of both worlds. jerry: that is a big problem. you can't get around that problem and they primary conversation. just like you can't get around common core if you are jeb bush. i think you'll have to explain it in a way that is credible to the b