The DNA analysis on Kennewick Man was officially declared 'undetermined.' Unofficially Chatters gives a 'rough' rundown of the DNA that was obtained and Ainu at 23% was the highest.
Chatters said that there are no American Indian/Native American (as we know them today) skeletons ever found in North America that are older than 6,000 years.
Skeletons like Kennewick Man, Spirit Cave Man, Buhl Woman and etc, belong to another earlier and completely different racial group of people than the American Indians.
You are correct. I couldn't remember Ainu.