Without "Other" and a further definition of "America," this is a poorly worded poll,
South America, Central America, and North America are all included in the name "America."
Originally, all of them belonged to Native Americans, as they were the first people here.
If only North America is included, then it originally "belonged" to Native North Americans. However, if you would like to include more recent people and the countries "Canada" and "the United States," then you should have to specify that. "Canada" would then belong to citizens of "Canada" and "the United States" would belong to citizens of "the United States."
In that case, everyone regardless of race, ethnicity, creed, color, sex, age, etc., who is a citizen would belong, and that would include all the Native Americans who are citizens of those nations.
The notion that some elite group is the only one to whom either nation belongs is like saying that, at an earlier time, Chicago belonged to the Mafia.