vulnerability that's the problem for him. >> so, asha, it's not the first time that the president has threatened to get involved in the investigation into his campaign. what do the threats say to mueller, you think? what do you think he thinks about them? >> yes, don, this is groundhogs day. we -- we see these repeated attempts. look, mueller is looking into already, i mean, this is going back a year into president trump's anger at jeff sessions, his -- his anger at jeff sess n sessions recusing himself, attempts to prevent jeff sessions from recusing himself. so these attacks on the justice department and i think more recently these intimations that he may replace jeff sessions i think continue to be more evidence for the mueller investigation. so it's either that the president doesn't really understand the kind of evidence that mueller is trying to gather