It is going to come down to ballot challenges. If every ballot is counted Biden wins. The Republicans have finally accomplished what they knew was coming and did nothing to prevent: They are not the minority party and can only win through discouraging turnout or successfully challenging and suppressing ballots.
Its a sad way to view what's been happening in this Presidential election but true. Also, my views has recently changed about a "landslide victory is needed" to prevent chaos.
I did not consider that one of them can get a landslide victory in the ballots but each state won may have had a very close vote count. Thus, each state won via a very close vote count can be easily taken to court about its results.
wrbtrader