it's a bedrock rule of courtroom procedure. you can use the defendant's own statements against them. twitter is nothing but the president's own unvarnished statements. the key in any obstruction case is intent, what is in the person's mind. one of the things judges tell juries in divining intent science has not given us to look into someone's mind. twitter is close. unusual to do it open but doesn't mean it's not being done. >> it's worth remembering mueller, if they find a crime they are not going to indict. this is not going to a court of law. if there's a question of obstruction as it's played out, it's going to be within the impeachment proceeding. that is going to be a power play. the democrats who by then may be in control of the house, can define obstruction the way they want to and shift and said today