https://www.thenation.com/article/politics/zohran-mamdani-democratic-party-establishment/

The only statement in this link about what the wider Dem establishment did is:

Cuomo called on his extensive political network to supply an impressive list of endorsements, including from former president Bill Clinton, former mayor Michael Bloomberg, and South Carolina Representative Jim Clyburn (a famous kingmaker who was instrumental in Joe Biden’s securing the 2020 Democratic presidential nomination). Labor unions, which tend to want to play it safe by endorsing likely winners, rallied to Cuomo’s side, including two important unions that had once called on him to resign his governorship (Local 32BJ of the Service Employees International Union and the Hotel and Gaming Trades Council).

“Mainstream Dems endorse a mainstream ghoul” isn’t really much of a surprise or an exceptional effort.

The other link offers, in addition

https://www.axios.com/2025/06/26/democrats-zohran-mamdani-meltdown-new-york

Reps. Pat Ryan, Josh Riley and Ritchie Torres — who went so far as to say he wouldn’t run for governor if Mamdani won — all dodged reporters.

Rep. Dan Goldman, asked if he had any thoughts on the result, told Axios: “Not right now.”

The top two Democratic leaders in Congress, Sen. Chuck Schumer and Rep. Hakeem Jeffries, both New Yorkers, declined to endorse Mamdani even as they applauded his victory.

New York Rep. Laura Gillen, from Nassau County, called Mamdani the “absolute wrong choice for New York.”

Rep. Tom Suozzi, also from Nassau County, said he had “serious concerns.”

None of this reflects positively on mainstream Dems. But neither is it “The Dems are FIGHTING THE PROGRESSIVE WING HARDER THAN THEY FIGHT TRUMP”.