we'll see if that happens. mueller and his team are really interviewing a lot of his associates. he did testify up on capitol hill, why do you think that mueller hasn't called roger stone to actually appear either in a question andans session or before a grand jury? >> well, bob mueller has been running a textbook investigation and i'm not going to kind of sideline quarterback his work. if you look number of guilty pleas and indictments. he's going at this very methodically and this is vintage bob mueller. keeping the politics out and doing it by the book. >> your committee, the senate intelligence committee, has been trying to get documents from roger stone. has he cooperated with you? >> again, you cannot under the committee rules talk about that kind of business. what i can tell you i think there are substantial questions left for the committee to