There is actually 0% chance of either Biden or Heels up Harris winning, because neither can win Georgia and Pennsylvania, which are the only 2 pick ups Trump needs to win now in 2020 since the reapportionment of electors after the 2020 census.
Harris is very much favored over Biden in the betting markets.
If you could bet on who gets the nomination I would bet on her.
But Trump (if he survives) will win. I’m not sure he will survive.
It looks as if big-name Democrats are shooting for 2028:
“Why Would Any Legit Dem Presidential Prospect Jump Into This Mess?”