President Trump said Tuesday that New York City Mayor Zohran Mamdani has a “really good personality” — but said he needs to stop the city from “losing people” and that he should convince the New York Stock Exchange to reverse the opening of an office in Dallas.

“I got along very well with him. We had some good themes, some good talks, and he’s the way he is. I guess you’re not going to change. You know, you grow up a certain way, and you sort of tend to be a certain way,” Trump told radio host Sid Rosenberg, recalling his November meeting with Mamdani.

“I want to see New York be successful, and if he could help make it successful, make it much more successful — because now it’s heading in the wrong direction, losing people, you saw I said the New York Stock Exchange, having a major stock exchange built in Dallas, is not a good thing.”

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The NYSE opened the Dallas office in March 2025, before Mamdani took office this month. NYSE Texas is a fully electronic equities exchange.

“I would have talked to them, tried to get them to not do that if I were the mayor of New York. That’s a big deal. That’s not a positive thing for New York,” Trump said.

“I think he’s got a really good personality. I think he’s got, you know, tremendous assets,” the president went on.

“Forget about what he says about me, I don’t care about that. It’s policies, you know, concepts that really haven’t worked over the last 10,000 years. They haven’t worked. And maybe he can get them to work. But a lot of people think that can’t happen. So you got to be very careful. When people leave and you when you have a stock exchange opening up in Texas, when you know things like that happen, that really makes your job a lot harder.”

Trump added, “I’d love to see him be successful. Because if he’s successful, that means that’s a good thing for New York so I would love to see him be successful.”

The president, 79, and mayor, 34, regularly exchange text messages and have maintained a surprisingly warm relationship — despite attacking each other ahead of last year’s mayoral race.

At a post-election Nov. 21 meeting in the Oval Office, Trump stunningly told the then-mayor-elect he was welcome to stick to his campaign rhetoric calling him a “fascist,” while both leaders emphasized they’d like to work together, including on initiatives to lower housing costs.

“I expect to be helping him, not hurting him, a big help because I want New York City to be great,” Trump said at that meeting.

“I think he is going to surprise some conservative people, actually, and some very liberal people.”

Still, there have been some earlier points of disagreement in Hizzoner’s nearly month-long tenure.

Mamdani, a self-declared socialist whom Trump nicknamed “my little communist,” called Trump to register his opposition to the Jan. 3 raid that captured Venezuelan President Nicolas Maduro and brought him to the Big Apple to face federal drug-smuggling and weapons charges.

The New York state government filed a lawsuit this month against the Trump administration for withholding $10 billion in social-services funding over alleged fraud concerns.

And Trump is threatening to withhold all funding for “sanctuary” jurisdictions, including New York state and New York City, effective Feb. 1, over their non-cooperation with immigration authorities. That action is also likely to be fought over in court.