Because Washington state uses a top-two system, this year’s Treasurer race happens to have only two Republicans on the November ballot, Duane Davidson and Michael Waite. In the August primary, the three Democrats split up the Democratic vote, so that the two Republicans placed first and second.
Now, a Democrat has entered the race as a declared write-in. He is Eric Miller, and he is actively campaigning. Washington state (unlike California) permits write-in votes in November for top-two offices. However, so far, the media in Washington state has given him little publicity. Washington state doesn’t release write-in results unless the write-in candidate gets at least 1% of the total vote cast in that office.