Some thoughts on this:
One of two things must happen: either Cuomo challenges de Blasio in 2017 or de Blasio runs against Cuomo in 2018. #popcorn
— Chuck Todd (@chucktodd) December 16, 2016
As to de Blasio himself challenging Cuomo in ’18, I don’t think he could successfully do that. He is not popular enough in the City, much less the entire state, to do that. I could see him getting behind someone like Eric Schneiderman should he decide to run against Cuomo.
At this point a primary fight is the only way I can see us ridding ourselves of Cuomo. The NY Republicans aren’t functioning as a statewide political party and do not have a lot of well known people they could put up against him. Even if they did, Cuomo would threaten the Senate GOP again and they would undermine their own nominee just like they did Rob Astornio in ’14. What we need is a scenario where both de Blasio and Cuomo can kill each other off.