This will energize his base and he will win the election. It will also mean Republican domination of the House and Senate. The next two years will be a clusterfuck as normal and barriers are demolished and regular people begin to realize they’ve elected fascism. The midterms will begin to look like a blue wave, but then they will point back to moments like this to declare the Democratic party “illegitimate” and remove them from ballot access, if midterm elections happen at all.
This is the end of any semblance of democracy in the US for at least a generation.