It's hard to tell whether Trump is deliberately stirring Democrats up or whether he just tweets anything that comes to mind, but what is very clear is that he is not paying attention to or is not aware of the threat from the Republican party.
There is a huge contingent of the Republican party that absolutely HATE him.
They are lying low right now because they would prefer a Republican in office, but if Trump wins, they are ready to wrench the party right back from him.
I've seen and heard the complaining and planning firsthand.
Maryland's current Republican governor, Larry Hogan, just wrote a book, has famously disagreed with the president on Covid and, reading the writing on the wall, might be angling for the 2024 nomination.
That would be my prediction.
He has a lot of popular support in a Democratic state and governs down the middle.
At any rate, come 2020, you will hear a lot more Trump hate, and a lot of it will come from Republicans.