The battle for generational change in the United States is on and it's taking place in New York City.

When 7.30 visits Harlem on a cold autumn evening 22-year-old Durga Sreenivasan is standing on a footpath in the chill wind fighting for every vote she can for Zohran Mamdani, a man who may be about to deliver the country a political earthquake.

Sreenivasan is a campaign organiser for Mamdani, who, if the polls prove correct, is set to make history by becoming the first Muslim Mayor of New York City, at 34 years of age.

He is also the son of immigrants and a Democratic socialist — but more importantly, he is making an impact.

Rarely has any election in the US outside a presidential campaign held as much interest around the world as this one. Foreign media crews are crawling all over Man

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