Brennan appeared nonplussed by that question. In light of events of this past year it is about as likely that he wouldn’t recall any U.S. ambassadors requesting unmasking as it would be that Hillary can’t recall the name of the person who told her that the Benghazi 9/11 was due to a video.
Just reading parts of the hearing transcript, Brennan is a duplicitous weasel, hypertechnical parsing all over the place. He’ll lie to the bitter end. Same cloth as crooked Hillary.