That part is rather odd. They probably belong in the Far West.also extending the midlands to the point where maryland is together with the dakotas and nebraska.
Where would you place it? Tidewater (and NYC being separate.. I'm not sure that it's different enough from either Midlands or Yankeedom to justify it beyond the history of Dutch settlement) is maybe the one I have the hardest time being convinced of; it's seems like it's separate just to justify relatively recent voting patterns.plus they chose the county I grew up in as one of the northern borders of tidewater, and besides being on the coast don't see the connection culturally.