would be arriving in the next 1. a lot of activity at the far end of the hallway, if you panned down this way. i can't see whether lewandowski has finally arrived. in advance of the hearing, the white house has told the committee that they are invoking something called "constitutional immunity." they say this is designed to protect the office of the presidency, whether it's a republican or a democrat. in other words, that the conversation between the president and his closest aides remain confidential. on that basis, they have instructed two former white house aides, rob porter and rick dearborn, not to appear today. but corey lewandowski was never former to formally a part of the administration. he was part of the campaign. so he doesn't have that immunity. but he has been directed not to answer questions that go beyond what he told special counsel robert mueller. earlier today we heard from white house spokesman hogan guilty who laid out there arguments this morning. >> it's our understanding he