A bombshell leaked email from an assistant to national teachers’ union president Randi Weingarten has revealed concerns about New York City mayoral candidate Zohran Mamdani.
School choice advocate Corey DeAngelis posted about the “leaked” email from Weingarten’s aide at the American Federation of Teachers, Leo Casey, who questioned Mamdani’s “ability to govern,” and pointed to progressive Chicago Mayor Brandon Johnson as an example of the failure of far-left policies.
The posts shared on X prompted responses from the ATF chief and assistant.
Casey’s email was sent to a Democratic Socialists of America group back in May, according to the posts from DeAngelis.
BREAKING: I have a leaked email from the “Assistant to Randi Weingarten” voicing concerns about Zohran Mamdani’s “ability to govern.”
“Mamdani has no experience in city government”
He points to Chicago mayor’s 14% favorability rating, saying “something has clearly gone wrong”
— Corey A. DeAngelis, school choice evangelist (@DeAngelisCorey) September 27, 2025
“A lot of our discussion here is on blocking [ex-Gov. Andrew] Cuomo and winning the election, which is important,” read part of the email that was sent just weeks before the June 24 Democratic primary, which Mamdani won.
“But the ability to govern also needs to be an important consideration,” Casey wrote in the email. “And winning an election does not necessarily translate into the ability to govern.”
“It is important to face squarely what happened,” the message continued, making reference to Johnson’s dismal approval ratings in Chinago. “It has not gone well.”
“Because Johnson was our candidate, there is no public discussion on the left of what went wrong,” he wrote.“But something has clearly gone wrong and it can’t just be attributed to our enemies.”
The email that was leaked to me was sent by Leo Casey, “Assistant to Randi Weingarten.”
He says “winning an election does not necessarily translate into the ability to govern.”
“it is important to face squarely what has happened in Chicago.. It has not gone well.” pic.twitter.com/y7MqZoqqU7
— Corey A. DeAngelis, school choice evangelist (@DeAngelisCorey) September 27, 2025
He pointed to the Chicago mayor’s poll numbers to make the case.
Mayor Johnson’s “poll numbers have dropped to 14% favorable, with an all time high in the history of the mayoralty of unfavorables, at 80%.”
“But something has clearly gone wrong, and it can’t just be attributed to our enemies.” pic.twitter.com/suLgz9GezZ
— Corey A. DeAngelis, school choice evangelist (@DeAngelisCorey) September 27, 2025
The United Federation of Teachers in New York City endorsed Mandani following the primary, evidently ignoring his controversial plans for the city’s school system.
The X thread by DeAngelis noted Casey’s background, as well as sharing that Weingarten’s assistant confirmed the email.
“Assistant to Randi Weingarten” pic.twitter.com/ojGYlrjRpb
— Corey A. DeAngelis, school choice evangelist (@DeAngelisCorey) September 27, 2025
“Leo Casey was paid $234,400 last year,” DeAngelis wrote. “He confirmed the authenticity of the leaked message from him concerning Zohran Mamdani’s ‘ability to govern’ and that ‘something has clearly gone wrong’ with Mayor Brandon Johnson in Chicago.”
Leo Casey was paid $234,400 last year.
He confirmed the authenticity of the leaked message from him concerning Zohran Mamdani’s “ability to govern” and that “something has clearly gone wrong” with Mayor Brandon Johnson in Chicago. pic.twitter.com/dGQJiyVqaB
— Corey A. DeAngelis, school choice evangelist (@DeAngelisCorey) September 28, 2025
BREAKING: Leo Casey, Assistant to Randi Weingarten, responds and CONFIRMS the authenticity of the leaked message from him that expressed concerns about Mamdani’s “ability to govern” and that “something has clearly gone wrong” in Chicago with Mayor Brandon Johnson. pic.twitter.com/xANjn1fgZt
— Corey A. DeAngelis, school choice evangelist (@DeAngelisCorey) September 28, 2025
Soon, Weingarten also chimed in.
“Randi Weingarten weighs in trying to defend her “Assistant” making $234,400 a year, but she doesn’t say anything substantive, and she turned off her comments,” DeAngelis shared, along with his response.
No it doesn’t, @rweingarten. His PR person completely omitted what he said about the disaster that is Mayor Brandon Johnson in Chicago.
Your “Assistant” Leo pointed to his 14% rating and said “it is important to face squarely what has happened in Chicago.. it has not gone well.” pic.twitter.com/uikKIjekH9
— Corey A. DeAngelis, school choice evangelist (@DeAngelisCorey) September 28, 2025
“Leo’s statement speaks for itself,” Weingarten said. “Sadly, it’s not a surprise Corey would try to drag me into something. He’s obsessed with attacking unions & smearing me. It’s not hard to figure out my views about Mamdani — I am a fan. “
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Originally from New York, Powers graduated from New York University and eventually made her way to sunny South Florida where she has been writing for the BizPacReview team since 2015.
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