been pitching to voters, and they have not been buying it, wolf. >> he was very, very firm. he said trump is unfit to be president of the united states. if invite other republican candidates to refuse to is a osay that, they are also unfit to be president. a very strong at the same time indeed. jeff zeleny, it was reflective of a speech we hear from chris christie. >> reporter: it was steeped in history, an understanding that very few have. he talked about how he got out of the race at 2016 and how he enabled donald trump, and fast forward eight years, he would not be an enabler to donald trump. he would rather lose by telling the truth than we by doing something less than that. but also went through the history of 9/11. imagine if donald trump had been