You'd have to have a crystal ball to know that.
Who knows, he could get covid or something.
It takes about two weeks to get over a mild case of coronavirus, and up to 6 weeks for a severe case. Trump likely did not get the virus today, so that 2 week window has already started. The next presidential debate is in 13 days.
I would also note that Biden was in the same room as Trump for 90 minutes just two days ago, so it is very possible that he also has it, or that he got it at the debate.
Well, I guess we won't be getting our debates after all. Crazy how that works.
Trump's tested so often, probably numerous times a day I bet. He had to have been recently infected by the virus meaning a solid two week quarantine period, maybe a bit less. If he were to drop out due to COVID-19 holy fuck that'd be some irony there.