Newsweek kind of fucking up the lede here but:
Under Mamdani’s directive, city agencies are required to safeguard personal information and limit cooperation with federal immigration authorities.
This latest executive order, Mamdani’s 13th since taking office, prohibits sharing information collected for city purposes with federal authorities except when required by law. Each agency has 14 days to appoint a privacy officer and take other steps to ensure compliance.
The order directs the New York Police Department, Department of Correction, Department of Probation, Administration for Children’s Services and Department of Social Services to audit their internal policies on interactions with federal immigration authorities and make any necessary changes public. It also bars ICE agents from entering city-controlled properties such as schools, hospitals, shelters and parking facilities without a judicial warrant.


It’s also federal law that requires they have warrants, so there’s no conflict that would involve the supremacy clause.
To enter public property? Nope, you’re wrong.
Since when? I can stroll into the lobby of a Hospital any time during business hours and so can Federal LE. Same with a school assuming the doors aren’t locked.
ICE isn’t just stopping in the lobby. The lobby is the place where you price you have a legitimate reason to enter the actual hospital.
And it seems you have not been to a school in a couple of decades. That shit has been locked down since the early 00s. If you f don’t have a kid in there, or were invited for some reason, they’re not letting you in.