Candidates is heating up. With senator ted cruz on the fast track in iowa. Running neck and neck with donald trump. Its a swift rise for the texas senator. A 21point gain since october in one poll. Cruz and trump up until now have played nice with each other. At all changed this weekend. In iowa, t tmp digging at cruz for opposing popular ethanol subsidies. If ted cruz is against ethanol, how does he win in iowa . Becacae thats very antiiowa. Reporter then on sunday morning shows. You look at the way hes dealt with the senate. Where he goes in there like a frankly, a little bit of a maniac. Hell never get anything done. Thats the problem with ted. Reporter cruz, in response, tweeting this video. Saying in honor of my friend, real donald trump and goodhearted maniacs everywhere. In the end, trump still wants to work with cr. Saying he sees cruz playing a part in n s administration. We would certainly have reporter this back and forth kicking off after cruz could be heard on tape behind