Biden's landslides in AL, VA, and NC look to be really important for his delegate lead. He'll net around 90 delegates from just those three states: brutal for Bernie.
(By "net" I mean how many delegates more than Bernie that Biden got there. It's a useful way to track how a candidate actually builds a delegate advantage over their nearest challenger.)
For comparison — it's far too early to get an accurate picture of what the CA delegate count will end up being, but by the *current* vote count Bernie would net around 60 over Biden there. (That vote count will change.)
