Coronavirus changes everything about the 2020 election. Trump is now the favorite to win. All he has to do is not fuck up egregiously.
People will continue to support Trump even in the face of normal incompetence from him – it will take outrageous incompetence to undercut Trump’s support.
On the other hand, outrageous incompetence is something that Trump regularly does. This is a man who went out bankrupt – repeatedly – running casinos, and whom no legitimate bank would do business with.