 He said that part of the reason that he got distracted was that Donald Trump, even though his microphone was off, was yelling constantly while he was talking, while Joe was trying to talk. And that caused him to lose his train of thought. First of all, you should be able to focus, even if some jackass is jumping and screaming and yelling 10 feet from you. Secondly, there was a split screen the entire time. Donald Trump didn't talk.