Oregon was always more liberal than Washington. Neither were out and out liberal states.
From 1940 to 1985, Washington has had 7 Governors — 4 Republicans and 3 Democrats.
Since 1984, EVERY SINGLE GOVERNOR has been a Democrat.
From 1940 to 1980, Oregon has had 10 Governers — 8 Republican and 2 Democrat.
Since 1980, EVERY SINGLE GOVERNOR of Oregon has been a Democrat.
This is how California ruined both Washington and Oregon. I agree neither was a conservative bastion before, but they were balanced, even if Oregon was always a little nutty.