our washington bureau. ken, this is someone throughout the investigation did a remarkable job of keeping things under wrap and stopping any leaks from coming out. we have not seen him. he is someone who has very specifically stayed a political, it stands to reason if he's coming out and speaking in public there is something he fe feels he needs to say. >> not only have we not seen robert mueller, but not heard his voice. he has been completely silent, even as others including notably the attorney general have been speaking about what his investigation found and what decisions he made. and, obviously, there are huge questions looming over that. questions that congressional democrats want to ask robert mueller in public under oath in a congressional format. and we're just speculating. i have been working the phones and no one seems to know what exactly robert mueller is going to say at 11:00 a.m., but it is