Today's school librarians are taking the lead with legislative advocacy for education and their efforts are beginning to have an impact on legislation. Advocates for school library programs in the state of Washington made historic legislative in-roads in 2009 with the passage of Substitute House Bill 2261. Arguably, the most important factor in Washington's legislative advocacy has been librarians' vigilant participation. One of the successful legislative advocacy strategies applied in Washington, designed around a similar Pennsylvania model, has been the Legislator in the Library Day. This event involves inviting a local senator or representative to spend a day or part of the day visiting the school library. This article discusses the implementation of the Legislator in the Library Day and how it helped the state school library organization (WLMA) accomplish many of its goals. It also discusses the outcomes for the school librarian hosting Legislator in the Library Day.