Zohran Mamdani won the New York City mayoral election on November 4, 2025, and took office on January 1, 2026, as the city's first Muslim mayor, its first mayor of South Asian descent, and its youngest in more than a century. He won on a promise that fit on a tote bag: freeze the rent, make the buses free, make childcare universal. Ten months in, we finally have something better than slogans. We have a record — and it is more interesting, and more instructive, than either his supporters or his critics admit.

Start with the win. On June 25, 2026, the Rent Guidelines Board voted 7-1 to freeze rents on about one million rent-stabilized apartments, with no increase on either one- or two-year leases — the first two-year freeze in the board's history. The freeze applies to leases starting October 1, 2026, and covers homes for more than two million New Yorkers. Mamdani appointed most of the board's members. This is what delivery looks like when a mayor actually controls the lever: he pulled it, and rents froze.

Now the partial win. In March 2026, Mamdani and Governor Kathy Hochul announced 2,000 free childcare seats for two-year-olds, funded by the state, with plans to grow to 12,000 next year. That is real, and it is also a fraction of the promise. Universal care for children from six weeks to five years old would cost an estimated $6 billion a year, and the tax increases Mamdani proposed to pay for it have not been adopted. Childcare is moving, but on Albany's timetable and Albany's budget, not his.

And then the stall. Free buses have not happened, because the buses are run by the Metropolitan Transportation Authority, a state agency, and fare-free service requires money from Albany that has not been provided. The city estimates free buses would cost $600 million to $700 million a year; the MTA puts it closer to $1 billion. In April 2026, Mamdani conceded it would not happen that year, and the focus has shifted to making buses faster rather than free. His first executive budget, meanwhile, totaled $124.7 billion for the 2027 fiscal year — a reminder that even a $124 billion budget does not buy a mayor control over the state.

That is the lesson other American cities should take from New York, and it cuts both ways. Mamdani's critics said his agenda was impossible; the rent freeze proves that the parts of it a mayor controls are very possible indeed. His supporters said a bold mayor could transform the city; the buses prove that the parts a mayor does not control will not move no matter how bold the mayor is. A mayor cannot set the minimum wage, cannot set transit fares, and cannot raise city income tax rates. All three live in state law.

So the question for the rest of the country is not whether to copy Mamdani's promises. It is whether to copy his method: find the lever you actually hold, pull it hard, and be honest about the levers you do not hold. On that test, ten months in, he is passing — and the grade will only get clearer as the rent freeze takes effect this fall.