when you're doing an in person interview. a voluntary interview. he'll probably have fbi agents with him. who are very seasoned in doing interviews and the main goal of an agent is to elicit information. and to do that in many any way they need to do it. could be to disarming to be friendly, to play dumb if you have to. you get the information you want. a grand jury subpoena makes it a much more formal environment. adversarial. and i think it's not ideal for mueller and his team to get the information they're looking for. >> julia, the president was asked about whether he thinks mueller will be fair to him. take a listen. >> we'll find out. here's what we'll say. and everybody says. no collusion. there's no collusion. now they're saying well did he fight back? if you fight back -- it's