And no shared border. Also, NY State is much more conservative than people assume, the State legislature is usually controlled by Republicans.
Massachusetts borders New York to the east. Or were you thinking California?
I don't know if the USA could be remotely the same if NY, MA, TX, and FL seceeded. I do know that they wouldn't at the same time, just by the nature of geography.
TIL MA and NY do not share a border...