I've said that for a while. Boundary line down the Croton River to the center channel of the Hudson and then out to sea; going the other way, up the New York state line to Lake Champlain (then we get the islands in the middle).
That way, they get Governor's, Terminal, and Riker's Islands; we get Bedloe's (Liberty) and Ellis. And West Point -- they get Chappaqua.
The immigrants came to America for Liberty, not Communism -- therefore it's right and just that we keep the Statue of Liberty and they get Jamaica Queens, Flatbush, the "Boston States", and 40,000,000 Democrats. We might even be able to trade them off to Canada for the Yukon, British Columbia, Alberta, and a province to be named later.
We'd get moderate-to-conservative Canadians, about 9,000,000 of them, and get rid of 40,000,000 Dems.
Then it's "go-home" time for about 30,000,000 Mexicans and Central Americans, and we expatriate the entire populations of Gay Bay, Seattle, D of C, and Ithaca, New York to the "Boston States". And Princeton.
We keep freedom and liberty, they get fresh bagels at 2 a.m., and everybody's happy. Right?
I like your plan but you had better act quickly. The dems have begun to infiltrate the burbs in the traditionally conservative communities just outside of Albany. And, they are winning elections.