Seattle is a lost cause. The University is there, and tons of California transplants. I refuse to cross the sound unless it’s mandatory.
Eastern Wa is as red as you get. Lots of farm land out that way.
Most of western Wa is quite Conservative as well, old Loggers, Fisherman and such.
Washington state is the story of practically every state in the Union, the Big Cities hand the state over to the Democrats when the Majority of the State is Red.
That is why Thomas Jefferson despised cities and wanted a Nation of independent Citizenry. Who made their own food/leather etc etc, and would be resistant to taxes to take away the fruits of their labor.