New York City Mayor Zohran Mamdani announced Monday that he will keep political consultant Morris Katz as a top adviser, even as Katz faces mounting calls from within the left to be permanently blacklisted from progressive politics. The decision ties Mamdani more tightly to a 27-year-old operative whose rushed vetting of Maine Senate candidate Graham Platner preceded one of the most embarrassing campaign implosions in recent Democratic memory.

"I will continue to work with Morris Katz, he remains a top advisor of mine," Mamdani told reporters at a news conference, as Fox News Digital reported. His office did not respond to a follow-up request for comment.

The mayor's defiance lands at a moment when even the Democratic Socialists of America, an organization that helped launch Mamdani's own political career, is urging allies to cut Katz loose. That an avowed socialist mayor is too loyal to a disgraced consultant for the DSA tells you something about the judgment on display at City Hall.

The Platner disaster, start to finish

Graham Platner won the Maine Democratic Senate primary on June 9, 2026, delivering a victory speech with his wife in Blue Hill, Maine. Katz and his consulting partner Daniel Moraff had pitched Platner as a potential successor to Sen. Bernie Sanders, and, according to Fox News Digital, even floated him as a future presidential contender, a claim Katz now denies.

The sell worked. Katz helped supercharge Platner's candidacy with polished video production, friendly media placements, and political connections, the DSA's own letter acknowledged. But the foundation was rotten.

Platner withdrew from the race after a rape accusation surfaced. He denied the allegation. But the accusation was only the most dramatic in a string of red flags: a Nazi-linked tattoo acquired during military service, controversial deleted Reddit posts, and alleged mistreatment of women. Any competent vetting operation should have caught at least some of these problems before primary voters ever saw the candidate's name on a ballot.

It didn't, because, according to a source familiar with the early stages of the Platner campaign who spoke to Fox News Digital, the vetting barely happened at all. Katz and Moraff paid just over $6,000 for a three-day background check. Industry standard for a Senate race runs weeks and costs tens of thousands of dollars. When the vetting team flagged concerns and asked to dig deeper, Katz and Moraff ignored the requests.

A three-day, $6,000 background check for a United States Senate candidate. That is not a rounding error. That is a choice.

Katz's response: deflection and intimidation

After Platner announced his suspension, Katz posted on X that the team had acted responsibly. He wrote that "as soon as the team became aware of the rape allegations against Graham Platner we advised he suspend his candidacy, and in the following days worked to wind down the campaign." He called himself "deeply disappointed."

A community note attached to the post pointed out that Platner's campaign initially denied the rape allegation, complicating Katz's narrative of swift, principled action.

More troubling was what happened behind the scenes. The Bangor Daily News obtained a message Katz sent to former Platner staffer Genevieve McDonald, who had apparently been cooperating with reporters investigating Platner's alleged treatment of women. Katz wrote:

"Just want to be clear on where we are right now. If the story goes in its current iteration we'll communicate directly on the record, and by name, that Genevieve violated the personal trust of Amy and Graham and shared explicit falsehoods to sabotage the campaign."

Read that again. A political consultant, whose job was to vet the candidate, responded to a staffer talking to the press by threatening to publicly accuse her of sabotage. That is not damage control. That is intimidation directed at someone who may have been trying to tell the truth about a candidate Katz had failed to properly scrutinize.

The Washington Examiner reported that the DSA's letter went further than simply criticizing the vetting failure, stating that Katz "has not shown an ability to be either ethical or strategic" and declaring: "Men like Platner must not represent the American Left, and those like Katz who push such candidates should have no role in our movement."

The book that won't go away

The Platner fiasco is not the only controversy trailing Katz. In 2020, at the age of roughly 20, Katz authored a puberty book marketed to "curious boys" aged 10 to 12. Sections carried titles including "Your New Penis" and "The Magic of Masturbation."

On page 15, a footnote stated that Katz had planned to "use images of my penis" to show children how genitalia develop during puberty, but that publishers rejected the idea as "inappropriate." Katz later said the comment was a joke.

When the footnote gained wider attention in March, the National Republican Senatorial Committee issued a statement calling Katz's "musings about exposing himself to ten-year-olds" "absolutely disgusting." Chaya Raichik, who operates the conservative X account "Libs of TikTok," posted: "Only a perverted freak would say that."

Whether the footnote was a failed attempt at humor or something worse, it is the kind of detail that any serious political operation would treat as a liability. Mamdani's decision to publicly embrace Katz after both the book controversy and the Platner collapse suggests the mayor either does not view these as disqualifying or simply does not care.

A pattern, not an accident

Mamdani's loyalty to Katz fits a broader pattern. The mayor, who defeated Andrew Cuomo and Curtis Sliwa to win City Hall, has consistently surrounded himself with ideological allies whose credentials lean more toward radical commitment than professional competence.

The Washington Free Beacon reported that Mamdani staffed his communications team with privately educated, elite-background operatives who openly espouse socialist and anti-capitalist views. His communications director attended a $55,000-a-year prep school and previously worked for Bernie Sanders. His speechwriting director, a graduate of the $67,000-a-year Dalton School, publicly praised accused murderer Luigi Mangione and suggested a New York City street be renamed in his honor.

These are the people shaping the public message of the nation's largest city. And the consultant Mamdani refuses to fire is a 27-year-old who skimped on vetting a Senate candidate, threatened a staffer who talked to the press, and authored a children's book with a footnote about showing minors photographs of his own genitalia.

Mamdani's broader political operation has already alarmed the Democratic establishment, with his endorsed candidates routing incumbents in New York primaries and prompting public warnings from figures like Attorney General Letitia James.

The alarm is not limited to New York. Newsmax reported that Katz himself traveled to California's Central Valley to produce a campaign ad for a progressive challenger running against a moderate Democrat in a Republican-held district, a move that threatens the party's own redistricting strategy designed to flip GOP seats. SEIU California Executive Director Tia Orr warned that the moderate candidate "is our best and only chance at beating David Valadao," signaling that the Mamdani-Katz operation is actively undermining Democratic electoral math in the name of ideological purity.

This is the consultant Mamdani will not let go of, the one now exporting internal party conflict to swing districts in other states while his own professional record is in ruins.

What accountability looks like, and doesn't

The DSA letter laid out the case plainly: "Morris Katz is one of the chief parties responsible for the catastrophic campaign of scandal-ridden Maine Senate candidate Graham Platner. Billed as a top adviser to the campaign, Katz helped recruit Platner and supercharged his candidacy with slick video production, friendly media placements and political connections."

Some Democrats have gone further, calling for Katz to be blacklisted from future political operations entirely. The fact that this pressure is coming from the left, from the DSA, from progressive activists, from within the very movement Katz claims to serve, makes Mamdani's refusal to act all the more revealing.

When Mamdani has defied the Supreme Court on immigration policy and used the nation's 250th birthday to attack ICE and American institutions, the pattern has been consistent: ideology first, accountability never.

The open questions remain. What exactly did the vetting team flag before Katz and Moraff shut them down? Who made the rape accusation against Platner, and what are the specific details? What did Mamdani's office know about Katz's role in the vetting failure before the mayor stepped to the microphone Monday and vouched for him?

None of those questions have public answers yet. Fox News Digital's request for comment went unanswered.

Voters in Maine were sold a candidate who never should have made it past the first background check. A political consultant cut corners, ignored warnings, threatened a staffer, and walked away claiming disappointment. And the mayor of New York City looked at all of it and said: he stays.

When the people in charge refuse to hold their own allies accountable for failures this obvious, they are telling you exactly what they think accountability is for, everyone else.