President Donald Trump is turning on Mayor Zohran Mamdani (again.)

The pair, who come from different sides of the aisle, have shocked many with their ability to work together despite ideological differences.

But Trump is seemingly having a change of heart when it comes to the 34-year-old democratic socialist mayor. In particular, with Mamdani’s newly revealed tax targeting some of the richest in the world.

Here's what to know.

This week, Mamdani announced plans for one of his key campaign promises: taxing the rich. Alongside Gov. Kathy Hochul, the mayor unveiled a new pied-à-terre tax - a first for the state.