"Donald Trump, since I know you’re watching, I have four words for you: turn the volume up!" Mamdani, a Democrat, said during a Tuesday night speech to a raucous crowd of supporters shortly after being declared the victor.

Democrats swept a trio of races on Tuesday in the first major elections since Trump returned to power nine months ago, elevating a new generation of leaders and injecting fresh momentum into the beleaguered party ahead of next year's congressional elections.

Mamdani made countering the 79-year-old Republican president's actions in the city - especially on immigration - a centrepiece of his campaign. The next three years will test his ability to go toe-to-toe with Trump, who wields the world's biggest bully pulpit and thrives on bare-knuckle politics.

"If anyone can sh

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