Obviously, New York State is not splitting into two. But what this post presupposes is, what if it does?
There's a theory out here in the Pacific Northwest that the Western halves of Washington and Oregon should actually be their own state while the Eastern halves should be a separate state. Both Western halves are much more liberal, focus around big cities and coastal towns and have shared industrial backgrounds. Both Eastern halves are more conservative, agricultural and rural.
In theory, it kinda makes sense. But perhaps there's a balance that makes the current makeup of both states work better.