Because this is the most f'd up thing that could happen, this is probably what will happen.
Biden wins the popular vote of course.
But
The electoral college ties. Which actually has a decent chance of happening. If GA, NV, AZ go back to the reds, and NE and ME split their electoral votes (which did happen last time) then it's a tie.
So the House elects trump, no question. Even if the Dems win the House, the house will sure as anything elect trump.
The Senate would then elect the vice president. Let's say the Dems hold the senate. Then they would elect a Democrat as veep.
So we'd have a R in the WH and a D as vice president. Chaos.
And then why not - let's stipulate that trump is convicted in NY and goes to jail while he's president.
what a country!