This is similar to the autonomy sought in Ukraine by the Donetsk and Lugansk regions, though there, the differences were cultural and language based. Those regions voted for their autonomy and have been subjected to constant artillery shelling by the Ukraine military ever since.
I could see Western Oregon and Western Washington also firing artillery barrages against breakaway areas of those states to eliminate angry conservatives for daring to want to leave the tyranny of those communist-held states.
I can see the tyrants of Western WA and OR saying to conservatives in the East, “You will continue to bow before us and serve us or we will destroy you and bury you in the finest traditions of totalitarian governments everywhere. You will continue to have no voice in our Leftist control over you and you will be happy we ignore your dissent.”
The Willamette Valley is the problem. Much of “western Oregon” is fed up with the status quo.