CNNW John King USA February 21, 2012
>> we begin tonight with presidential politics. new numbers that underscore just how important our big debate here is tomorrow night and a new twist in the campai campaign conversation. a new cnn times poll shows a statistical dead heat this arizona. 36% for mitt romney, 32% for the surging rick santorum. add in a small santorum lead in michigan which also votes next tuesday, and what you get is a tense, volatile gop race as the final four candidates prepare for their first debate in nearly a month. in a moment how the tightness of the race is playing out among the candidates. but fi...