Well, tomorrow is the big day. About a third of ALL delegates are up for grabs tomorrow and we should have a pretty good idea about the state of the race after tomorrow
Here is a run down of all the states:
California - 271 delegates by congressional district, 90 based on statewide, 54 PLEOs.
Texas - 149 based on STATE SENATE districts, 49 statewide, 30 PLEOs
North Carolina - 72 based on CD, 24 statewide, 14 PLEOs
Virginia - 65 based on CD, 21 statewide, 13 PLEOs
Massachusetts - 59 CD, 20 statewide, 12 PLEOs
Minnesota - 49 CD, 16 statewide, 10 PLEOs
Colorado - 44 CD, 14 statewide, 9 PLEOs
Tennessee - 42 CD, 14 statewide, 8 PLEOs
Alabama - 34 CD, 11 statewide, 7 PLEOs
Oklahoma - 24 CD, 8 statewide, 5 PLEOs
Arkansas - 20 CD, 7 statewide, 4 PLEOs
Utah - 19 CD, 6 statewide, 4 PLEOs
Maine - 16 CD, 5 statewide, 3 PLEOs
Vermont - 11 CD, 3 statewide, 2 PLEOs
American Samoa - 6 based on combined weight of the population
I won't do an in-depth analysis for each state but you can check out some more details here:
https://www.thegreenpapers.com/P20/D (just select the state that you want). Ultimately, Biden should do really well in the southern states and Virginia while Bernie will do well in New England and the West. The real key is who can win Texas and what the size of Sanders lead in CA will be. I think Sanders winning by single digits in CA would be an unmitigated disaster for him and that would probably cause Biden to come out on top in terms of delegates. If Biden is the delegate leader after tomorrow, he'll undoubtedly be the nominee because the map gets better for him here on out. On the other hand, if Sanders can win convincingly in Texas he may have an insurmountable lead.
One thing to note is that A LOT of votes have already been cast (about half in Texas already) so it's possible that Biden's momentum doesn't help him as much as we'd think. In addition, there are a few wild cards in play. Buttigieg, O'Rourke, and Klobuchar endorsed Biden. Bloomberg dropped half a billion. Warren is viable in a lot of states. At the end of the day, we really shouldn't be shocked if we see a strange outcome.