The question is, why did Obama do well in many north-central counties(the ones north of Yakima) while he didn't do as well in coastal counties/counties in the west. Is the working class made up of slightly different kinds of people in those counties or something?
Kittitas has the college vote in Ellensburg
Chelan has a lot of "latte liberal" mountain voters around Leavenworth
Okanogan has the same around Winthrop and Twisp, an area which had an incredible partisan swing from about 60-40 GOP to 60-40 Dem between 2000 and 2004 (despite no discernible change in population). The rest of the county doesn't really have any reason to be a Clinton stronghold, and it wasn't.
Obama also does well enough among the non-unionized, working-class-but-not-poor in the West, and that includes Washington.
Douglas is, well, weird. I'll have to look at it more when I have data.
Okanogan county has grown a lot and has seen more tourism, making it more of a latte-liberal area. Douglas doesn't have many Democrats to begin with.
The results on the Eastside are not very surprising at all.