James Chatters, the paleoanthropologist who did all the early work on Kennewick Man never called him a Caucasian. His first impression on seeing the skull was that he was dealing with an European pilgrim to the area but, after further evaluation he realized he had an ancient skeleton that displayed some Causoid characteristics.
KM still has those characteristics and is believed to be related in part to the Ainu/Jomon people of Northern Japan who are tall, light skinned, hairy and have some Causiod like features. He is not an European.
I just completed reading a good book last night by J.M. Adovasio (he excavated the Meadowcroft Site), titled: The First Americans. He said the Corps Of Engineers 'securing' of the KM site was equlivent to the Taliban blowing up the Buddhist statues in Afghanistan.
The cranial reconstruction on the Time cover is pretty bad. The area between the eyes (nasion notch if I remember back a few years) is different, but look at the chin! Look at the overall nasal breadth.
The Time cover has a forehead which slopes at a different angle than the cranium. The medial brow ridges are very different. Its hard to see in these illustrations, but the degree of round headedness also looks different and that is a major point.
The base of the jaw (gonia) appear wide on the cranium, but the Time illusration suggests much less of this, but the other reconstruction shows it well.
I would love to sit down with that skull for a few hours in a well-stocked bone lab! First thing I would check is the thickness of the frontal bone.
I kind of agree with that last statement.