President Trump just sent a direct warning to New York City — and it’s about money. President Trump on Wednesday evening signaled he’s willing to hit New York City right in the wallet if its newly elected mayor pushes ahead with a sweeping new tax on the wealthy. The warning landed on Truth Social and came in response to a plan the mayor unveiled alongside Governor Kathy Hochul this week — a proposal that would roughly double the property tax on New York’s most expensive second homes. The so-called “pied-à-terre” tax would apply to second homes in the city valued at $5 million or more, with the mayor’s team estimating it could generate as much as $500 million in annual revenue. Roughly 13,000 properties would be affected — many of them owned by out-of-state buyers, foreign investors, and the Wall Street class that has made Manhattan a top destination for the ultra-wealthy for decades. In his Truth Social post, Trump didn’t hide his view. He framed the new tax plan as part of a broader pattern he believes is driving residents and businesses out of the city — and made clear federal money flowing to New York could be on the chopping block. “Sadly, Mayor Mamdani is DESTROYING New York! It has no chance! The United States of America should not contribute to its… TAX, TAX, TAX Policies are SO WRONG. People are fleeing. They must change their ways, AND FAST.” — President Donald J. Trump, Truth Social Journalist Nick Sortor was among the first to pick up on the post and flag how serious the threat could get if the White House decides to act on it: JUST IN: President Trump has launched an ATTACK on Communist NYC Mayor Zohran Mamdani — insinuating he may WITHHOLD FEDERAL FUNDING to the cityDO IT, 47!STOP FUNDING THE PET PROJECTS OF A FOREIGN COMMUNIST!Take America’s largest city back! pic.twitter.com/aTsg6UtkEB— Nick Sortor (@nicksortor) April 16, 2026 The threat lands at a critical moment for New York. The city has leaned on federal dollars for years — for counterterrorism, transit grants, FEMA reimbursements, Medicaid flow-through, and dozens of other line items — and any meaningful squeeze from Washington would force painful choices at City Hall. According to coverage from The Hill, Mamdani’s team is pitching the tax as a way to fund expanded housing, transit, and school programs without adding to the city’s debt load: Mayor Mamdani’s administration argues the pied-à-terre tax is aimed squarely at absentee luxury ownership, with proceeds earmarked for housing and infrastructure. Roughly 13,000 properties valued at $5 million or more would be affected, generating an estimated $500 million annually, according to City Hall. But critics argue the math doesn’t add up — and that even a half-billion-dollar tax haul won’t fix a city they say has a spending problem, not a revenue problem. Financial commentator Avery Daye broke it down plainly: Mamdani proposes a pied-à-terre tax, which would essentially double the property tax for those with a second home valued over $5M in the city.This is a false promise. It’s a lie. Taxing the rich never works. The government has a spending problem, not a revenue problem. When… pic.twitter.com/eT24BcvTk3— Avery Daye (@AveryDaye) April 17, 2026 The concern from conservatives isn’t only about the specific proposal in front of voters right now. It’s about what comes next. Once the city establishes that second homes over $5 million can be double-taxed, critics warn the threshold will quietly slide downward — first to $3 million, then $2 million, then to primary residences of anyone the political class has decided is “rich enough” to punish. In reporting from The New York Post, real-estate groups have warned the plan could accelerate the exodus of high-net-worth families from Manhattan to Florida, Texas, and the Carolinas — states that have spent the last five years building an aggressive pitch to New York money: Industry analysts say a pied-à-terre tax of this size would be the most aggressive levy on luxury real estate in any major American city, and could push the marginal cost of owning a qualifying second home past the point where many out-of-state buyers decide it simply isn’t worth it anymore. Whatever happens next, the Trump-versus-Mamdani fight is shaping up to be one of the defining political showdowns of the year. On one side: a mayor who ran openly as a democratic socialist and is wasting no time going after the city’s wealthiest residents. On the other: a President who has already shown he is willing to use federal dollars as leverage against cities he believes are hostile to taxpayers. If this week is any indication, New York City’s next four years are going to get a whole lot louder before they get any quieter.