projects.fivethirtyeight.com/
I would say Sanders HARD floor is 33-35% on average. Biden’s HARD floor is 45-50%
There are the totally undecided, “what difference does it make?”, and open to changing my mind at any time even though I like both candidates equally for different reasons.
Just before south Carolina happened (along with the Jim Clyburn endorsement) and ALL the other candidates dropped to Biden, would Super Tuesday happening before all of the above made non-Bernie supporters switch him over Biden?