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>> the fight for number two is the hottest ticket in the republican primary race. wolf, make no mistake about it. donald trump is also trying to influence this fight for number two. the questions he raised about ted cruz citizen ship are still dogging senator cruz in iowa and thats where donald trump is heading tomorrow for a weekend of campaigning after he finishes up tonight here in north carolina. >> jeff, thank you. jeff zeleny. lets get some more now on this. joining us our chief political ...