Over 15 democratic candidates have been revealed, but some of the clear standouts were Corey Booker, Kamala Harris, Andrew Yang, and Bernie Sanders. Corey Booker and Kamala Harris are usually considered establishment Democrats since they get a lot of corporate backing compared to Andrew Yang and Bernie Sanders.
The situation we might end up with on the ballot, assuming Corey Booker and/or Kamala Harris get on the ballot, Democrats should vote for Andrew Yang instead of Bernie Sanders, let me explain.
Many consider Andrew Yang's platform as superior to Bernie Sanders, but the issue is that he might split up the democratic vote, causing someone like Kamala Harris or Corey Booker with more corporate relationships. Kamala Harris or Corey Booker may not end up with the majority of the votes overall, but they may end up with the biggest percentage, even though they do hot have majority support, similar to how Trump won. If a situation happens where there are no establishment Democrats, I would advise you to vote for Andrew Yang.