the weekend. former national security adviser and top trump campaign surrogate michael flynn's legal team told the president's legal team they would no longer share information with them. that could be a sign that flynn has been flipped, or she at lea least -- he is looking to strike a deal with mueller's team. federal investigators gathered enough evidence to bring charges in the investigation into flynn and his son mike flynn jr. a white house official tells nbc news that there's no concern that flynn will implicate the president. "there is no answer-thgst at th house that general flynn is taking whatever steps are in his best interests." joining me, attorney general of new jersey from 2008 7 to 2010 d now distinguished scholar at the nyu law school. thank you for being here. >> thank you. >> how common is it for lawyers to enter into a joint defense