Tallest Skil
Banned
The examples of Lloydminster and Alsask on the Alberta/Saskatchewan border show that it's possible to have cities that span subnational boundaries.
As much as it pains me to say, Canada isn’t part of the US, and as such isn’t applicable.
From memory, it requires approval of congress and approval of all states involved (NJ and NY) to adjust state borders.
Yep, that’s the only way New York City could get land from New Jersey, so easy expansion would have to come elsewhere.