Thanks. Found this which is quite informative. http://hnn.us/articles/7302.html Guenter Lewy, Were American Indians the Victims of Genocide?
It’s also interesting to compare the US history of Indian relations with that of Argentina, which had similar problems with the native population.
Unlike the US, genocide/extermination was official Argentine policy for decades. Worked, too. Argentina has no Indian problem, since it has no Indians. Final Solution and all that.