Forensic anthropologists who got a look at the earliest known human remains found in North America think he looks Ainu rather than Native American.
Some Ainu’s facial features appear European. Their eyes may lack the Asian almond-shaped appearance, and their hair may be light and curly in color. However, this does not mean that Kennewick Man necessarily was European in origin. His features more closely resemble those of the natives of the Pacific Rim than those of Native Americans.
The details available through forensic anthropology are amazing, and this interestingly complicates the history of the Americas (and maybe the history of Japan, as well). I remember well the first time I read an archaeology paper comparing Northwestern US neolithic sites to Jomon sites….