That's the most important set of numbers, and the most terrifying to most Dems.
The primary system is failing so far...it is choosing the hard left candidate even though the hard left is a small portion of the Dem party.
Part of this is that primaries attract extremists and part is that the moderate vote is split many ways.
I have no idea how this is going to resolve any better than now...BBerg is going to be on the ballot soon and that will split things yet another way.
Bernie has lost a lot of support from 2016 but since he is essentially the last lefty standing, he wins.
Truly the US has an awful voting scheme.