While the state declines to register voters by party, the state is decidedly lacking in moderates.
Urban areas tend to be extremely liberal while suburbs and rural areas are very conservative.
The current result of this conflict is a democratic governor and tied legislature. More locally, politics is so lopsided that city politicians don't even bother to run by party. Another unique Washington quirk is the state's fondness for direct democracy. Statewide initiatives in the last year have capped state spending, slashed taxes, and ended affirmative action. The good news is that anyone who has lived in Washington for 30 days is allowed to vote.