again. we are ticking off the people who have been interviewed but in a major investigation like this with complicated facts, it certainly wouldn't be out of the ordinary for mueller's team to go back to these people more than once, more than twice. >> because it really looks like mueller's investigation is heating up. last week, two indictments, a guilty plea, a lot more revelations emerging. this train is moving. >> the train is moving. it's heating up. i think we'll hear more things. one interview in and of itself does not tell you the whole picture. if he was involved in the deliberations around firing director comey, there are two documents already out there that are inconsistent. one is the rob rosenstein memo that lays out reasons related to hillary clinton that suggest the president lost confidence in director comey. the president sent a letter directly to director comey saying i asked you three times if i was under investigation. i didn't like the answer,