To succeed in office he will need to keep his supporters engaged with day-to-day governing, experts say.

Mamdani, a 34-year-old democratic socialist, already faces intense scrutiny, even before taking office in one of the country's most scrutinized political jobs.

From freezing rents to free buses and municipal grocery stores – a recap of the policies that won Mamdani the office

Democratic socialist mayor led historic push to lead New York, speaking on immigration, Trump and subway burritos

To succeed in office he will need to keep his supporters engaged with day-to-day governing, experts say.

Can the Democratic socialist deliver on the big cost-of-living promises that propelled him to victory?