In Canada, we call BC the ‘left’ coast but other than Vancouver Island and the Lower Mainland (Greater Vancouver), BC is rather more conservative.
I guess that CA, OR and WA form the ‘left’ coast in the US, though I imagine that outside of the big cities like SF, LA, Seattle and Portland, many, if not most people are conservative.
I was reading in the Herald this morning about people in a group of in northernmost CA who are forming a secessionist movement. Not surprisingly, they feel alienated as if a lot of what’s going on in Sacramento does not take them into consideration.
Oh, and yes, you are right, people in E. Wash. are quite conservative. You see this play out almost daily with various issues.