testify publicly before a senate committee as early as next woke and will testify about the conversations he had with president trump. supposedly urging him to drop the investigation of the former national security adviser michael flynn. let's bring in our correspondents and specialists. brian falah keilar, how potentially damaging to the white house could the comey testimony be? >> pretty damaging. obviously he can't talk about what's going on in an ongoing investigation so there's that. we know he's expected to stay in bounds there. he can't talk about classified information, but it's not classified for jim comey to talk about conversations that he may have had with president trump, and we've seen the reporting, that he wrote memos or wrote a memo on this, where he has hey alleged that donald trump asked him to lay off investigating michael flynn. there are already critics of donald trump's even in his own party, and for many critics this is just going to allow them, if we do hear this from jim comey to say, look, that's a brick in the wall of a case for