CNN New Day With Alisyn Camerota and John Berman December 17, 2019 11:56:00
>> it's a good relationship where we have established the trust with each other and where i can tell him where i think he's making a mistake with what he's doing in a respectful manner. >> reporter: ambassador cornstein soon asked us to stop recording, but off camera we asked him about his recent dinner here with rudy giuliani. he would only say that the men are close personal friends, and that he hadn't even asked giuliani about the purpose of his visit here. throughout the conversation, though, cornstein seemed unfazed by criticism that has come his way. he told us simply i report to one man...