Sen. Mark Udall White House Chief of Staff Denis McDonough met with Senate Democrats Thursday to provide a briefing on President Obama's immigration plans. But once the immigration talk was over, the meeting reportedly devolved into chaos as an angry lawmaker confronted McDonough over the White House's foot-dragging and obstruction over releasing the committee's report on CIA torture. "It was a vigorous, vigorous and open debate -- one of the best and most thorough discussions I've been a part of while here," said Sen.