I suppose it was inevitable that the Democratic party, as it became more and more diverse, would see a generational showdown. The older (60's and 70's) white women in my family are currently all in for Biden. They will definitely vote for whoever is the Democratic 2020 Presidential Candidate, but it has caused some tension in the family, who are usually very cohesive in our hate of Trump.
The arguments have turned more towards how really progressive candidates will destroy the Democratic Party with their socialist ideas like Medicare For All, and The Green New Deal. To me, these ideas are not pipe dreams, but necessary. I feel like we don't have time to wait for moderates to be able to stomach these changes. For me, it is far too early to back anyone at this point, but I really feel strongly that we need a much younger generation in charge. Our kids are going to have to live in a terrifying future filled with impacts from Climate Change, and older generations have consistently failed them. It is time to hand over the reins to generations who actually have a vested interest in the future.