New York Mayor Zohran Mamdani sharply criticized the Supreme Court's decision allowing the Trump administration to end Temporary Protected Status for thousands of Haitians and Syrians in the U.S.

He called it "not only cruel," but also "something that we will not ever accept."

Mamdani also pledged in a video address Thursday that the city would continue providing legal assistance to affected migrants and enforcing its sanctuary-city policies, including limiting cooperation with federal civil immigration enforcement.

In a 6-3 decision earlier Thursday, the Supreme Court ruled that federal courts cannot review the government's decision to terminate TPS protections for more than 6,000 Syrians and 350,000 Haitians living in the U.S.

"Today, the Supreme Court made a decision that is putting so many people's lives in jeopardy," Mamdani said.

Mamdani said he had just returned from a rally with 1199SEIU, the healthcare workers union, many of whose members were "Haitian New Yorkers who are concerned about what this means for their status in our city."

"And frankly, this city, the one that we love, is one that has been built by so many from so many different parts of the world," he said. "And that includes our Haitian brothers and sisters, our Syrian brothers and sisters.

"And we stand here ready to be in solidarity with all of those who are concerned by today's decision. And beyond just language of solidarity, actions of solidarity.

"Now, what that means when it comes to our city is if you are worried about what this means for your status, if you're worried about what this means for your family, I would encourage you to call our mayor's office of immigrant affairs hotline."

Mamdani described New York as a city "that's proud of our immigrant heritage."

"And when we think about especially what Haitian New Yorkers have had to deal with, not just for weeks or months or years, but frankly for decades, we have seen a cruelty that has become normalized," he said. "And to have a people who frankly taught the world about freedom have their own freedom be put in jeopardy by the actions of a Supreme Court and a federal administration, it is not only cruel, it's something that we will not ever accept."

New York's sanctuary rules largely prevent local officials from enforcing federal immigration law or broadly cooperating with ICE. But Mamdani, an avowed democratic socialist, has boosted the Big Apple's sanctuary rules since taking office in January.

The mayor signed an executive order in February strengthening sanctuary protections, including a prohibition on ICE entering city property such as public schools, homeless shelters, and hospitals without a judicial warrant.

As part of the order, Mamdani's office said it was auditing city agencies to determine whether they were complying with sanctuary policies. It also issued recommendations for departments to improve compliance and ordered training for city workers on sanctuary laws.

City data showed there are roughly 117,000 Haitians and nearly 12,000 Syrians across the Big Apple.

He added: "And so, we stand here as New Yorkers proud of standing in solidarity and proud to do everything that we can to keep people in their homes and to keep people together.

"And we're proud of that because we know that at the core of what it means to be a New Yorker is also to celebrate the many different places that we all come from.

"To understand that no matter where we were born, no matter what language we spoke growing up, we belong in this city and this city belongs to us."