Barr is smarter than the average bear.
Today's "hearing" was a voluntary deal for Barr, and Waddler changed the rules
after he accepted the invitation, so Barr told him to pound sand. The Fat One wanted outside counsel to question Barr to make it look like a Watergate or Iran Contra hearing, pure optics, and Barr wouldn't play ball. He can't be found in Contempt for that, so Waddler's threats are empty.
He'll have to issue a Subpoena, which Barr will honor and cut the questioners to pieces like yesterday.