The issue with Trump is that he excites the Democrat base just as much as the Republican base - for opposite reasons - but he motivates Democrats just as much as Republicans. Their irrational hatred is that bad.
Not so much that the Uniparty doesn’t have to resort to cheating.
And the more this top-down socioeconomic hell goes on, the fewer real Democratic voters there will be, which is most likely what happened in 2020.