People whose ancestors have been here for many generations don’t have a single ancestral nation with which to identify. Me, I have an English surname, but ancestry from: England, Scotland, Ireland, France, Germany, Switzerland, Czechoslovakia, and several native tribes. The only answer to give to such a question is “American.” There is no other country to which I can turn, for identity or anything else.
Same story for my family. Some of my ancestors were here since time immemorial, some came from the British Isles before the Revolution, and some came here from Africa in chains.
I don’t know what else to call myself, but American.