>> so if there was some reason to believe the president tried to coach somebody not to testify or to testify falsely, that could be obstruction of justice? >> yes, under an obstruction statute, yes. >> so if there is evidence that the president tried to conceal evidence, that would be obstruction of justice potentially, right? >> right. >> in your memo, you talked about the comey decision. you talk about obstruction of justice and you already went over that, which i appreciate. you wrote on page one a president persuading a person to commit perjury would be obstruction. is that right? >> yes. >> okay. >> any -- any person who persuades another -- yeah. >> you also said a president or any person convincing a witness to change testimony would be obstruction. is that right? >> yes. >> josh campbell, those were not equivocal answers there.