Zohran Mamdani spent months talking like the mayor of New York City could turn the NYPD into an enforcement arm for an international court. Then his own lawyers apparently got involved. In a video released Tuesday night, Mamdani conceded that City Hall does not have the independent legal authority to arrest Israeli Prime Minister Benjamin Netanyahu if he comes to New York for the United Nations General Assembly in September. That is quite a retreat from the campaign promise that helped make Mamdani a national figure on the far left. Benjamin Netanyahu is a war criminal. pic.twitter.com/YRezmW6YVx — Mayor Zohran Kwame Mamdani (@NYCMayor) July 22, 2026 Mamdani did not abandon his attack on Netanyahu. He called the Israeli leader a war criminal, accused him of genocide and said he was not welcome in New York. The admission that mattered came in the very next breath: after reviewing what Mamdani described as every available legal avenue, his administration concluded that New York City cannot independently enforce the International Criminal Court’s warrant. The mayor then tried to pass the demand to Washington, calling on the federal government to join the ICC and execute the warrant instead. There is one glaring problem with that pivot. President Trump had already made the federal government’s position unmistakable. According to the Associated Press, President Trump said Monday that Netanyahu would not be arrested “in any way, shape, or form” while in the United States. The AP reported that Mamdani issued his concession late Tuesday after previously saying his administration was examining whether local authorities could act on the ICC warrant. His legal review ended with City Hall admitting it had no independent enforcement power, even as the mayor continued to demand Netanyahu’s arrest. Netanyahu is expected in New York for the U.N. General Assembly in September. The AP also noted that the United States is not an ICC member and that Washington has rejected the warrant, leaving Mamdani’s fallback appeal aimed at a federal government whose answer was already public. So Mamdani has now landed in an extraordinary position. He admits his own city lacks the power to carry out his threat, then demands help from a federal administration that has already rejected the entire premise. This was not some obscure technicality uncovered at the last minute. The United States Code says that no agency or entity of a state or local government may cooperate with the ICC in response to a request made under the Rome Statute. The same section bars state and local entities from extraditing a person from the United States to the court or providing support to it. That language does not leave much room for a mayor looking to stage an international arrest at a New York airport. The United States is also not a party to the Rome Statute, the treaty that created the ICC. The court can issue warrants, but it has no police force of its own and depends on governments to make arrests. The United Nations treaty record lists the countries that ratified or acceded to the Rome Statute. The United States signed the treaty in 2000 but later notified the U.N. that it did not intend to become a party. The record matters because the ICC relies on participating governments to carry out its warrants. Member states accept cooperation duties under the treaty; a city government inside a non-member country cannot simply claim those powers for itself. Israel is not a party either. Although the ICC says it has jurisdiction based on the Palestinian territories, neither Jerusalem nor Washington accepts that the court can command American police agencies to detain Israel’s sitting prime minister. That is the legal wall Mamdani’s promise finally hit.