There has been essentially 5 tiers of support (examples):

1. Biden, Sanders, Warren (15%+ to 30%)
2. Buttigeig, Harris (10+ to 15%)
3. Steyer, Klobacheur (5%+ to 10%)
4. Gabbard, Yang, Bloomberg, Booker, Beto (2% - 5%)
5. Bennett, Williamson (under 2%)

** I know some people have dropped out. **

Some movement between these but generally there has been a distinct separation (I particularly liked Harris falling from tier 1 to tier 2). But they are starting to work themselves out to The moderates - Biden on around 30% and Buttigeig on about 10% vs the Progressives - Sander on around 20% and Warren on around 15%

I think think this fight between Warren and Sanders will do nothing good for either of them. I think Sanders will lose some sheen but I think Warren will too and with time off the trail I can see them both bunching up with Buttigeig at around 10%-15%

HOWEVER I see Biden getting a caning as a result of investigations currently at work, backed by the results of whatever comes out about Hunter and he during the Senate hearings.

So HOPEFULLY his support will drop like a rock. IF this happens I can see he will he will join Warren and Sanders.

Can you imagine all of them clumped together and not far off the Yangs and Steyers and Klobacheurs? Suddenly competitive and even more unpopular and divided