The DNC establishment is refusing to support Mamdani after he won the primaries

Mamdani is currently courting endorsements from top Dem players, many of whom have spoken positively of Mamdani but refrained from an explicit endorsement at this time. Their failure to immediately jump into endorsing a clearly popular candidate who won the primaries is damning on a personal level, but far from “The DNC is refusing to compromise!” at this juncture.

Also, see the two points of the edit.