Without mute, Biden is allowed to just sit there and let Trump talk. With mute, Biden will be FORCED to answer. When is the last time you saw him get through a paragraph without gaffing all over himself. Muting Trump and forcing Biden to talk is the worst thing that could happen to Biden. Trump will continue to make facial expressions, but we'll being hearing Biden talking. This will be the best thing that could possibly happen to Trump. This will be his best debate. Instead of remembering Trump yelling, we'll be left with what ever Biden is able to get out while mumbling. The key question is... what will Biden mumble about the laptop. Will he deny it? Will he refuse to answer? I suspect he'll give a slippery answer that sounds like a lying lawyer. Joe Biden is copied on e-mails from that laptop. Joe could personally authenticate those e-mails. I expect he'll do nothing close to that tonight which is a basic admission of his guilt in this money laundering operation.