Also, before starting with the State-by-State analysis, here is a little map of what could be regions in the new USA :
Northeast
Rust Belt
Southern East Coast
Gulf South/Deep South
Outer South
Midwest
Great Plains
Southwest
West
West Coast
Pacific
Very nice redrawing, Antonio.
Logical and sound.
I know adding Milwaukee with Chicago would have created too big a state and that many people from those 2 urban areas would kill me, but maybe there is "something" in here.
And, of course, as you've modified Oregon/Washington/Idaho, there would have been something to do with WV/Virginia/Maryland. And, well, in this case, DC would grow with its suburbs.
As for the regions, there is just one thing: one may wonder if Adirondack should not be in the Rust Belt and not in the NE, even if it's not so rusty: just based on electoral behaviour.
(if it's only on geographical criteria, Indiana should in MidWest and WV in Rust Belt; if it's on electoral behaviour, it's Adirondack in Rust Belt).
One final question: have you done your redrawings only on geographical lines or checking electoral maps and the weight of each new state
?