Mamdani actually is a little Trump. He emulates or coincides with Trump in political maneuvers. They both employ the same election strategy. They both exploit stupidity and ignorance in reliance on delusions.
Similar to Trump, most of Mamdani's policies are very exciting to his supporters, but may turn out to be too radical and infeasible, and hence will encounter vehement resistances. Again like Trump, many of his policies will be challenged in courtrooms and consume a lot of judicial resources.