“I was having a bad night when I realized that even when I was answering a question, when they turned his mic off, he was still shouting, and I let it distract me,”
Exactly, he never spoke at the same time Joe did, he even finished with time remaining several times. You cant say that with a split screen. the optics would have been horrible. Also, maybe there is a way, but why wouldnt Joes mic pick up Trumps voice too?