The moderates are consolidating around Biden. This is what they should have done months ago, but it could still be effective now (although Sanders seems poised to win CA and TX at the very least).
The progressives, however, are not consolidating around Sanders, who has the best shot at nomination according to every single poll. And by progressives, I mean Warren, who has performed absolutely dismally in nearly every contest so far and is polling behind Sanders in her home state.
To remind everyone of why this is strange, recall that when Sanders was simply behind in the polls, long before a single vote had been cast, there were constant calls for him to drop out and endorse Warren. If Warren had won the popular vote in the first three primaries and came in 2nd place in SC, every network would be clamoring for Sanders to step aside. But Warren is staying in the race, and her campaign communications material indicates it's specifically to take votes AWAY from Sanders and force a brokered convention.
She is now directly attacking Sanders in her speeches, while he has yet to say a negative thing about her. She is taking in millions of dollars from a SuperPAC after swearing to never accept money from them--and due to a loophole, she doesn't have to disclose who is funding it. She has compromised on her Medicare for All plan and reduced it to a public option funded by a head tax that disproportionately affects lower income earners. And now she is sidelining his path to nomination while having zero path herself, for no discernible policy-related reason and seemingly purely for personal gain.
There was a time when I would have loved to see a Sanders-Warren unity ticket, as it would have ended the primary months ago. But as of right now, I don't think Warren has any progressive convictions that wouldn't be compromised by money and prestige.