Really? I don't think most poeple in American have any Native American ancestors. My grandparents all came her in the second half of the 18th century. Not much chance to do the swirl with aboriginal Americans back in Europe.
Since then, it's all Poles on one side and Irish on the other. They wouldn't even consider marrying a Protestant, much less and Indian.
I suspect that's most white people in the USA. Maybe the WASPs did more intermixing back in the pilgrim days, but I know tons of European Americans and they all have stories like mine. And of course European Jews married European Jews exclusively for 1000 years or so, so none of them have Indian blood either.
People in Oklahoma or something? Not people in places like Wisconson, Michigan, Illinois.
I am no expert and don’t claim to be but the Ancestry genealogy site makes the claim that of the families that were in the US before 1800 about 50% show some Native American DNA. However Ancestry considers Native American to be from all of America not just what is now the US so that does skew the picture too. I just learned that, I was not aware of that so confuses that more. Also learned that Ancestry has very little DNA from tribes we used to refer to as Indians in what is now US. Really skews the picture and means you are probably right about the number with what we think of as Native American as being much lower.
I probably should have said many not most, I am in the Southwest so it is more common here and I need to remember the big picture is not always the same. What we used to refer to as Indians were scattered all over what is now the US and some of those tribes don’t exist any more so likely we will never really know if there is no DNA or not enough for comparison. Much more likely for families that have been here before 1800...which several of my branches were but probably still not common. My mother’s grandmother was Cherokee, her family never were tribal members but mother had cousins that were.