President Donald Trump says New York City’s planned pied-à-terre tax “must be stopped” and that the U.S. government may be able to intervene. In a Truth Social post, he characterizes the measure as a “dangerous political ‘experiment’” and argues it would harm New York City and the state.

The tax is associated with New York City Mayor Zohran Mamdani’s proposal targeting certain owners of second properties. Multiple outlets report that a state court has temporarily halted implementation, which Trump is now citing as the immediate backdrop for his comments. CNBC and Bloomberg describe Trump as looking at whether federal authority can stop the policy, including by pursuing a broader federal approach.

The Daily Signal also reports Trump’s criticism and highlights his threat of federal action. Across the coverage, outlets differ mainly in emphasis—some stress Trump’s potential legal or federal review of authority, while others focus on the timing of the court halt and his message that the measure would be financially and politically damaging.