Despite what Sinatra would have us believe, if you can make it in New York it doesn't mean you'll make it in the mid west or any of the purple states. (Democrats haven't had a vote share lower than 65% since the 00s I think)
Yes, a record number came out to support him but almost as many came out to support anyone but him :(
My hope is that for all the naysaying, Mamdani turns out to be a technocrat in the Sewer Socialist model and shows the country socialism ain't so scary. The whole "laboratories of democracy" in action.
50.4% against a candidate supported by the Republicans, most of the Democrat establishment and deep-pocketed billionaires, and backed by social-media algorithms.
And what in that equation would change were we to try a similarly progressive candidate nationally? Except for the fact that most of the country is less progressive than New York...
The victory in NY is mostly about moving the Overton Window to the left.