You can keep NYC. It's a nice place to visit, but...
I still think a third party would only serve to divide and already divided electorate. What would the third party be, socialist, progressive, communist or anarchist? I think we can live without it is those end up being the choices, and seeing what had become of the Democratic party , that's what we'd get. Not very attractive, at least to me.
Don't forget we already have more than two parties to begin with. The Green Party and the Libertarian Party both fielded candidates that did nothing and got no real support. If I remember my math correctly that means four parties not
three.