The pressure is on Zohran Mamdani following his landslide victory in New York City's mayoral election. 

The 34-year-old democratic socialist has become the city's youngest mayor and first South Asian and Muslim mayor. 

US pollster Henry Olsen says Mamdani may not be the answer to issues facing the Democratic Party. 

He told Mike Hosking everything depends on how Mamdani acts when he takes office. 

He says if Mamdani pushes an ideological agenda, that could be a problem for the Democrats as a whole. 

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