I agree that the majority of Americans are immigrants. But you said 98% above. Probably 40% of American are descended from settlers or African slaves, the peopl

I agree that the majority of Americans are immigrants. But you said 98% above. Probably 40% of American are descended from settlers or African slaves, the people who constitute the founding population. 19th century Germans and Scandinavians are difficult to categorize. On one hand, the nation was well established by the time they came. On the other hand, they were the original settlers, creating greenfield cities, in large swaths of the country. Depending on how you count them, a majority of Americans may not have immigrant ancestry. But it’s surely a very large fraction.