This is a purely legal question. If a witness testifies under oath, that they were not made aware of, of all things, a Senate Judiciary Committee's request/offer to come to them to receive testimony, would the lawyers representing said witness be in breach of their legal responsibility, and be in breach of their Bar Association's oath of duty, possibly causing disbarment? Asking for a friend…
Was that dude on Laura just doing morse code with his eye blinking?