and seems more irritated than anxious that he has to watch the man who has loomed over his presidency take center stage. >> mueller has testified, again, how many times? two and a half years. >> reporter: trump has been quizzing people about what to expect while complaining democrats will never let the investigation go. >> they think this is helping them. >> reporter: his republican allies are assuring him it won't change a thing. >> i've heard all i need to hear from mueller. >> reporter: even if mueller reveals nothing new, trump wants to expose the investigation as the hoax he believes it is. >> actually it started practically from the time i came down on the escalator. >> reporter: trump tweeting republicans should turn the tables by asking why were all of clinton's people given immunity, and why were the text messages of peter s. and his lover, lisa page, deleted and destroyed right after they left mueller and after we requested them. >> i'm not going to be watching, probably, maybe i'll see a