It's amusing speculation, but three years before the election how good is anyone's crystal ball?
The number of things that could happen between now and then . . .
Heck, the number of things that have happened already, from rising COVID-19 infection rates to the Afghanistan debacle to V.P. Harris behaving like a befuddled teen, to the Manchin-Sinema-Pelosi-Ocasio-Cortez-Omar-Schumer circular firing squad . . .
Imagine more stuff like that happening, or, on the other hand, equivalent stuff happening to the prospective nominees (Republican or primary challengers from the Democrat party) Biden may be facing.