I know this sounds crazy but contracting C-19 may work out in Trump's favor. Trump may be in quarantine when the next debate comes up. If I know Trump he will NOT be a no-show. He will debate Biden from the oval office hopefully like he was addressing the nation. The fact they are kept apart will allow Trump to be clear and consistent in his talking points without becoming entangled in the irritating back and forth with Joe.
As far as Joe is concerned he'll be all alone on stage. He'll be forced to answer the questions in there entirety with no interruptions to rescue him. In other words, Joe will be Joe 'intellectually naked' on stage doing what he does best. Furthermore, from what I understand the debate questions will not be announced prior to the debate like they were under Wallace which will further exacerbate Joe's predicament.
Trump will recover in full and show what a fighter he truly is. They'll be a renewed triumph/celebration among his supporters and even those who hate his guts, a little sliver of admiration pierced their heart, although they would never admit it.
Here's to you President Trump