>> it's going to be awesome. captioning sponsored by cbs po this is the "cbs evening news" with scott pelley. >> pelley: we open with a bid of one, no trump. the political play of the day by pulling out of the next presidential debate tomorrow night. if it is a publicity stunt, it's working. but it could also be a risky move. five days before iowa, where donald trump is neck and neck with ted cruz, in the battle for the first votes of campaign

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