THe "mongolian" indians do NOT want any proof that maybe it is a "caucasian" that was here first?
Didn't Joseph Smith (Mormons) profess that?
It is far more probable that Kennewick man was Ainu than Caucasian. The Ainu are a non-Japanese population indeginous to Hokkaido and the northern Islands of Japan. It is believed that the Ainu population was isolated before the monern races were established.
Another possibility is that he was related to the Aborignies of Australia and the South Pacific in that evidence of their presence has been found in Brazil predating the modern Indian populations.