There is the "America" the nation (comprised of the _actual_ American people), and America the country (the territory) that the American nation occupies, along with several other nations and diasporas.
They are distinct things and concepts.
Discussion
I’m going to rewrite your note and substitute the definition of nation that YOU provided. Since the American nation doesn’t exist, the term nothing will be used as a substitute,
There is the "nothing" the nation (comprised of the _actual_ American people), and nothing the country (the territory) that the nothing nation occupies, along with several other nations and diasporas.
This note is complete nonsense based on your definitions of a nation.
The American nation does exist. It is a distinct people (not to be confused with a country, or a nation-state, etc etc), as I have been patiently trying to explain for over a dozen posts.
If you're unable to parse the concept because of some prior miseducation or an unacknowledged conflict with your worldview, sorry but can't help you there.
You have made all the claims here. You said that the American nation consists of a group of people of the same race, culture, and language.
Where is this American nation? Who are the members of this nation?
The nation is located within the United States of America.
I have already answered who the members of this nation are, refer to post referencing the six elements of being American.
Is the American nation exclusive to the United States of America? Can the American nation exist in Europe for example?
No, there can be diaspora populations of the American nation in Europe or other parts of the world, just like there are diaspora populations of the Chinese nation in most corners of the world.
Can someone change his nation?