I've mentioned before on here (in other topics), that there are a few cities in the country that are in the unique position of being the de facto "seat" of entire sectors.
In the case of NYC, they're, for all intents and purposes, the seat of the US investing & banking sector, so what happens there, most certainly has the ability to have spillover impact for people who don't live in NY.
(the same way I have a vested interest in what happens in the Bay Area with regards to the tech sector, despite having never lived in the bay area)
Mamdani has proposed raising taxes even higher – adding a 2% income tax on New York City residents who make over $1 million per year and raising the top corporate tax rate to 11.5% (from 7.25%)
If someone living in another state does any significant business with JP Morgan Chase or CitiBank, you don't think that them having their corporate tax burden increased by just under 60% would have a few wide reaching impacts?