The next Democratic president needs to be stubborn, machiavellian, and downright psychotic beyond even FDR. We need to purge Trump and Trumpism with an iron fist or we will never be rid of it. We never stamped out southern rebellion or completed reconstruction and we are still paying for that mistake today.
If we elect another tepid cross-the-isle institutionalist like Obama or Biden this country is toast - assuming we get the chance to elect any Democrat at all.