voluntarily. at least five of these former-white house trump staffers who have gone in and spoken with either members or staff on the committee. and we know what the committee is trying to figure out, which is really essentially what was happening inside the west wing on that day? what were the conversations like? what did it really look like? what was the president saying? what were his top aides saying? they are really trying to figure out and piece together what that day looked like from inside the west wing which has kind of been this black hole as we have talked about what was happening with lawmakers, with staffers and whatnot on capitol hill. and so, this is significant the fact that these five -- at least five former staffers have gone in, spoken with the committee. and it doesn't necessarily mean that nano exactly what trump was doing in the oval office but they could know something that could be helpful potentially to the committee. and the reason for them going in without a subpoena or any kind of legal reason, we're told, is either because they believe they have information that they would like to share with the committee or they do fear that eventually it could take that legal route. and they could be compelled to come in by the committee because it's pretty clear who the committee has wanted to talk to