I am not a Seattle resident, being north of there in King County, but Seattle did elect a Republican mayor for the first time in decades.
Off topic, a judge fined Meta, the owner of Facebook, 5.52 million for 882 violations of election law in Washington state.
I was stationed at Whidbey Island for almost 4 years. I used to know the area well. When I was there the Seattle suburbs ended at Everett. When I went back in 2004, they had extended halfway to Mt. Vernon. I imagine it is all the way to Mt Vernon, now.