Due to the special election held in November 2017 , the Senate returned to a Democratic majority .
After Pam Roach won a seat on the Pierce County Council in the 2016 election , Tim Sheldon , once again , became president pro tempore of the Washington State Senate .
Due to the special election held in November 2017 , the Washington State Senate returned to a Democratic majority .
After Pam Roach won a seat on the Pierce County Council in the 2016 election , Tim Sheldon , once again , became president pro tempore of the Washington State Senate .