01Short answer
No public record supports treating Mamdani as a communist official. He is associated with democratic socialist politics and won office through Democratic elections.
Opponents use communist as an attack because his platform includes rent controls, free buses, city owned grocery stores, stronger labour power and higher taxes on wealth.
The record should be judged on whether the policies are legal, funded, competently run and accountable to voters.
02Why the label appears
The communist label is a national attack line against left wing city politics. It is also used to connect local affordability proposals to Cold War language.
A clearer description is democratic socialist: public provision, stronger tenant power, labour rights and a larger role for government in daily costs.
03What to judge
Judge the record through law, budget, services, appointments, contracts, civil liberties and delivery. Those are the mayoral tools that change public life.