Why does Donald Trump hate Zohran Mamdani so much, so that he even called on his supporters to vote for his nemesis Andrew Cuomo?
Simply because 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 exciting to his supporters, but will turn out to be infeasible and encounter vehement resistances. Again like Trump's, many his policies will be challenged in courtrooms and consume a lot of judicial resources.
However, ironically, the vast triumph of Mamdani manifests an intense repudiation of Trump.
