2026-08-07 · contested story
'Socialism is a disaster': Bill Ackman says Zohran Mamdani's bad left-wing housing policy is worsening New York's affordability crisis
Billionaire hedge fund manager Bill Ackman, CEO of Pershing Square, has intensified his public campaign against New York City Mayor Zohran Mamdani, arguing in a Fortune interview that the city's affordability crisis is a 'policy failure, not a market one' and that Mamdani's democratic socialist agenda—particularly a rent freeze on roughly one million rent-stabilized apartments—is actively worsening the situation. Ackman declared that 'socialism is a disaster' and warned New Yorkers to 'Watch what happens to New York City if Mamdani succeeds in implementing these plans.' This dispute unfolds against the backdrop of Mamdani implementing signature campaign promises, including the rent freeze (a 7-1 Rent Guidelines Board vote) and a new 'pied-à-terre' tax on luxury second homes, which the administration rolled out by publishing a searchable database of property owners.
How each side frames it
left
"Republicans are lashing out at New York City Mayor Zohran Mamdani after he announced the city had taken a significant step forward in securing millions in taxes owed by the city's ultrawealthy residents."
"Republicans arguing against a tax that will affect only a very small portion of the public yet benefit the majority"
"The CEOs are already girding for class war over the campaign's signature issues—taxing the rich, a rent freeze, universal childcare, fast and free buses, and public groceries."
"CEOs and billionaires—and the media beholden to them—are already stoking fear and anxiety with the specter of capital strikes and capital flight."
"An April poll from Siena University showed that 54% of the state's voters supported a tax hike on New York City residents making over $1 million, while support was even higher among voters within the city itself, at 62%."
center
"The decision drew praise from tenant advocates but criticism from some landlords, who argued rising insurance, financing and operating costs were already straining building owners."
"That's a bit on exaggeration, although essentially true — the Florida state legislature has placed a property-tax-reduction measure on the November 2026 ballot and it still requires 60% voter approval; it would phase in a larger homestead exemption rather than eliminate property taxes outright."
"Tenant groups and some housing researchers argue deregulation, not stabilization, has done more long-term damage to affordability, noting more than 300,000 units were deregulated between 1994 and 2019"
"The Department of Finance included properties that don't seem to meet the criteria, for example, including every unit in some condominium buildings even if they don't meet the value threshold to qualify."
"This isn't like you're buying an apartment and the bank sends an appraiser and they look at the condition of your cabinets... It is very much computer-modeled based on trends, statistics, and other factors."
right
"his administration published a searchable database identifying affluent property owners who could be subject to the city's proposed pied-à-terre tax, a move critics say could expose them to harassment and public safety risks."
"'It's a reckless and foolish move, especially considering there are potentially thousands of properties on this list that do not qualify as second homes or whose owners will successfully dispute their inclusion,' Council Minority Leader David Carr"
"Retired New York City police detective Kit Ying Koon, 64, has lived in his home at 217 Abingdon Ave on Staten Island for almost 34 years. He and his wife raised four children there"
"'…Housing costs are… so high because left-wing mayors have made it very difficult for developers to build here, and Mamdani, by freezing rents, is just going to make the problem worse'"
"It's similar to 'The Dark Knight Rises,' when the villain Bane decides to take over and destroy Gotham City by unleashing a gigantic class war."
What each side left out
The left left out — covered by the The New York Sun & Fox News & New York Post & The Damage Report/CNBC clip
- Middle-class and retiree homeowners wrongly included on the pied-à-terre tax list
- The database containing over 960,000 records far exceeding the ~13,000 intended targets
- Ackman's specific argument that 60,000 rent-stabilized units are off-market due to unrecoverable renovation costs
The right left out — covered by the Daily Kos & Nevada Current/The Conversation & Vanity Fair
- Polling showing majority public support for taxing NYC millionaires (54-62%)
- Research/data indicating millionaire tax flight is largely a myth
- Business leaders privately reporting they actually like Mamdani after meeting him
The right left out — covered by the The Times & Artnet News & Hell Gate & WSJ
- That property tax and ownership records were already publicly available for decades
- That the tax roll publication is required by state law
The left left out — covered by the New York Post & The Real Deal & Crain's New York Business
- Concern that the pied-à-terre tax could squeeze Black and brown homeowners under property tax reform
- That the initial list was 'overly inclusive' and confusing to tax attorneys
The center left out — covered by the Newsmax & Fox Business & The Daily Wire
- Explicit ideological characterization of the agenda as 'socialism is a disaster' as a headline claim (Fortune uses it but contextualizes)
What's actually true?
[verified] New York City's Rent Guidelines Board voted 7-1 to freeze rents on one- and two-year leases for nearly one million rent-stabilized apartments
[contested] Ackman claims about 60,000 rent-stabilized units are off the market because renovation costs can't be recovered under rent regulations; state reported over 57,000 vacant rent-stabilized apartments as of April 2026
[contested] The pied-à-terre tax is expected to raise approximately $500 million annually for New York City
[verified] The city's initial pied-à-terre tax roll identified more than 31,000 properties, far exceeding the ~10,000 estimated when the tax passed
[verified] The pied-à-terre tax applies to condos/co-ops valued at $1 million or more and one-to-three-family homes valued at $5 million or more that are not primary residences
[verified] Property ownership and tax records in NYC were already publicly available before this database publication
[verified] Ackman said 'socialism is a disaster' and warned to watch what happens to NYC if Mamdani succeeds
[verified] Austin, Texas rents fell after the city built substantial housing supply
The narrative clash
How many people are affected by the pied-à-terre tax / whether it targets only the ultrarich
Left: Republicans arguing against a tax that will affect only a very small portion of the public yet benefit the majority
Right: Many of the homes included in the database appeared to be misaligned with a tax aimed at well-heeled residents with multi-million dollar vacation homes, including some two dozen modest homes on Chaffee Avenue in working-class Throggs Neck in the Bronx.
Whether wealthy residents will flee due to higher taxes
Left: Overall, only about 15% of millionaires who move end up with a lower tax bill... overall tax migration ends up being a small fraction of a small fraction. Not never, but not often.
Right: he warned that policies championed by Mamdani and other progressive leaders risk driving businesses, investment and taxpayers away from New York
Whether the database constitutes dangerous 'doxxing'
Left: The New York City Department of Finance has had a website for many years where anyone could look up any piece of property and see what real estate taxes the owner is supposed to pay... I don't see anything material that is different this year
Right: he's trying to couch this as transparency. And instead, it's a searchable hit list, is what it is.
Whether rent regulation or deregulation causes affordability problems
Left: Tenant groups and some housing researchers argue deregulation, not stabilization, has done more long-term damage to affordability, noting more than 300,000 units were deregulated between 1994 and 2019
Right: About 60,000 units are off the market because renovation costs can't be recovered under rent regulations
86 sources analyzed
Rolling Stone Daily Kos The Boston Globe The Damage Report Common Dreams The Nation Mediaite CNN The Conversation The Washington Post The Daily Beast PBS grist.org USA Today The Guardian Politico NBC News Al Jazeera U.S. News & World Report MSN (UK) Vanity Fair The City Reporter Crain's New York Business NYC.gov FOX 5 New York SILive.com The Hill CBS News Artnet News U.S. News - Money Spectrum News NY1 Financial Times The Times News Radio 1190 KEX TheWrap WSJ Realtor.com Fox Business news.bloombergtax.com The Real Deal The Clay Travis & Buck Sexton Show Modern Ghana FOX One livemint.com The Daily Wire Hell Gate BeInCrypto ForkLog CPA Practice Advisor Habitat Magazine Washington Times HousingWire roundtable.io BBC MS NOW Yahoo CNBC Reuters AP News KUOW Pittsburgh Post-Gazette Bloomberg.com CalMatters EWTN News Kansas City Star the-independent.com Axios ABC News - Breaking News, Latest News and Videos WPDE Time Magazine WGLT cbs17.com Forbes KING5.com Yahoo Finance CoinDesk Fortune Nevada Current In These Times The Telegraph Arizona Daily Sun New York Post Charlie Kirk The New York Sun Fox News Newsmax