“Time to wall-off Manhattan, and 75-100 other cities, like in Escape From New York.
Goldwater suggested that during the 1964 campaign.
Although IIRC his idea was to cut it loose from the rest of the country and tow it out to sea.
That sounds more like what ol’ Hank Johnson (Idiot-GA) would say: The island will tip over if too many Marine go to one side. (Or something to that effect.) But I like the idea.