It appears to have been commissioned by Demand Progress on behalf of the DSA and/or Aviles.
https://demandprogress.org/wp-content/uploads/2025/09/demand_progress_ny10_toplines.pdf
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I feel sorry for Ladner. He's probably is looking for a spot to land now that it's been revealed that he won't have a role in Mamdani's administration. As per CNN...
One person who is out of the picture for now is Brad Lander, the city comptroller who was at that first Working Families meeting and later allied with Mamdani under the primarys ranked-choice system.
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But over the summer, Mamdani would confide he wasnt much impressed with Lander. Nice enough guy, but he didnt seem particularly effective as comptroller, Mamdani said according to a person familiar with his comments. The two went weeks without talking, and though Lander would get defensive and blame overlapping post-election vacations, all his talk that hed be the one really running the city next year had gotten back to Mamdani and not gone over well.
By the weekend before the election, Landers wife was telling friends at a party that Mamdani had called to tell the comptroller he would not have a job in the administration since he wasnt getting the job he wanted. By the day before the election, Lander was reaching out to major donors to solicit commitments for a congressional run against Rep. Dan Goldman, according to a person familiar with the matter.
Lander declined to comment on his plans on Tuesday night.
https://www.cnn.com/2025/11/05/politics/how-zohran-mamdani-won
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It will be interesting to see who gets the DSA endorsement.