Democratic Dissident John Fetterman

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Who owns the future of the Democratic Party?

That’s the question on everyone’s mind since last Tuesday night—when the richest city in America elected 34-year-old democratic socialist Zohran Mamdani as its mayor.

You can see Mamdani’s win as a one-off—a charismatic contender facing a rival mired in controversy. But the other way to see it is as emblematic …