I understand what you think you are seeing and that you are probably not alone in this. But you haven’t managed to convince me that there is a «cohesive coalition». I think people who believe that this is what they see may have gotten a bit carried away.
I isn’t a cohesive coalition. I think leaders and activists in the left think there is one. Because the leading DNC chair candidate says stuff like this: https://x.com/benwikler/status/1878205257789960435 (“As DNC Chair, our leadership team will lift up our full coalition—with Black, Latino, Native, AANHPI, LGBTQ, Youth, Interfaith, Ethnic, Rural, Veteran, and Disability representation.”).
