The "American" is bull. Those folks should be "unknown." Actual American ancestry
Well, technically they are of American ancestry if their parents were born here.
Ok, then I suspect the most "American" district in the US is a heck of a lot higher than 35%.
Isn't 'American' ancestry codename for 'white racist redneck'?
It just means that your family has been here so long, that you don't know anything about your ancestry. I can't believe otherwise credible sources use it, especially when there is a "real" American ancestry that is something else entirely.