executive privilege to cover up wrong doing, he will push back. >> it's fundamental law that executive privilege cannot hide misconduct. you cannot use the executive privilege to hide misconduct by the president. whatever evidence was given to the special prosecutor, any claim of executive privilege is waived by the act of giving it to an investigator. >> reporter: the house democrats to investigate going forward depending on what bob mueller finds, doesn't find will essentially inform all of these house democratic investigation over the next several months. at the moment the next fight they expect to be a process fight, a fight overseeing the documents and seeing the underlying evidence and potentially a fight to call up bob mueller to capitol hill to testify about what he found. >> it's beginning to seem more and more likely that once the report finally comes out that it will create even more