nuland wouldn't confirm the authenticity of the tape but she doesn't deny it either. >> i'm obviously not going to comment on private diplomatic conversations. other than to say it was pretty impressive trade craft. the audio was extremely clear. >> reporter: even after nsa revelations of u.s. wiretapping of foreign leaders the state department calleded publicizing of the call a new low for russia. the months' long protests in ukraine to oust that country's president have divided the u.s. and russia with both accusing the other of meddling in a volatile explanation. now no one has apologized for the incident. still german chancellor angela merkel called the statement unacceptable. the state department doesn't