New York City is one of the most expensive cities in the world to live in, a fact that guided many New Yorkers’ votes in Tuesday’s mayoral primary election.

Slickly produced social media videos set out Zohran Mamdani's vision for tackling the cost of living crisis - with ambitious policies paid for by new taxes on the rich.

Here are some of the factors that drove Zohran Mamdani to the cusp of a seismic upset, and how they will affect the general election in November.