Democrats must stand by Biden through the early stretch of the primary calendar to avoid that fate, the group implores.

“Donors hedging their bets on Biden because of Bloomberg could be creating a doomsday scenario for Democrats everywhere,” the group’s treasurer, Larry Rasky, wrote. “The Sanders-Warren wing of the Party is ready for the Bloomberg fight. Democrats cannot afford a split Convention.

“If Bernie has more delegates, do you really think the Bros will make way for Mike?,” it added, referring to the hard-core Sanders supporters known as “Bernie Bros.” “Not to mention that the legacy of the Sanders campaign (such as the Squad) will ravage any chance Center-Left Democrats have of maintaining hard won victories in states from Pennsylvania to California.”