So, I am skimming another post on this incident over at Pat Dollard and he has a snippet from Scott Johnson at Powerline.
"There is a bit of a backstory here that may not have been reported. Rep. Delahunt is a member of the House Judiciary Committee, but not of the subcommittee that was holding the hearing. As such, Delahunt was not entitled to participate in the hearing, but could do so only with the unanimous consent of the members present. Delahunt was so eager to cross-examine Addington and Yoo and demonstrate his hostility to the Bush administration that he showed up and asked to question the witnesses. The subcommittee's chairman, Jerrold Nadler, asked for such consent, but Republican Steve King of Iowa refused. Delahunt stuck around, and when King left the room, another member ceded his time to Delahunt so that Delahunt could go after the witnesses. Chairman Nadler agreed, since Rep. King "didn't care enough to stay." Delahunt proceeded, and the above exchange ensued. The entire hearing was conducted in an atmosphere of poisonous partisanship, and Delahunt's suggestion that in the controversial exchange he was merely trying to be cordial toward Addington is laughable."