Didn't he once famously say that he could shoot someone on Park Avenue in broad daylight and still get away with it?
I think the quieter Trump supporters will be leaving him at the moment, the ones who genuinely thought that he was an uncorruptable business man who'd make a good President. They will leave him now because it's obvious that he is not only corrupt, but quite mad as well.
The rabid followers, the ones who believe Qanon is real, they will stay with him till the end of time.