Remember, the original idea of the united states was that it was a bunch of separate governments that were federated. It still kind of is, but the federal government used to have much less control.
https://en.wikipedia.org/wiki/Member_state_of_the_European_U...
https://en.wikipedia.org/wiki/Member_state_of_the_European_U...
> nobody will ever say that Germany or France are a "paese"
Google lists > 200.000 results for "la Germania è un paese".
Which article or amendment of the U.S. Constitution forbids a state to leave without permission of the U.S.?
And good luck finding a good vehicle to overturn that precedent.
The TEU at least provides an explicit process for leaving
"country" = geographic unit, "state" = political unit.
The United States is itself a state, albeit a federation of smaller states.
And conversely, there are states spanning (parts of) more than one country: The UK with North Ireland and many others (perhaps England, Scotland and Wales if you consider them separate countries).