When they leave NYC they will bring their attitudes and voting habits with them. I was born in Manhattan. My surname traces to a settler in New Netherlands in 1664. I grew up in Queens, my siblings all still live there. I left in 1980, and never looked back.
Even with Guliani the place is crowded, expensive and dirty. If you are wealthy, I suppose that the restaurants and theater and museums can make living there tolerable, but for a middle class schmoo you need twice the income for half the lifestyle.
Get out, and when you leave, vote Republican.
The democRat religion runs deep and strong.