About half of Washington’s 49 state Senate seats and all 98 state House seats are up in 2026. The Associated Press will provide vote results and declare winners in contested primaries for U.S. House, state Senate, state House and state Supreme Court. That was slightly higher than the roughly 1.9 million votes cast in the 2022 all-party U.S. Senate primary. Washington conducts its elections almost entirely by mail, and very few voters cast their votes in person. In the 2024 state primary, the AP first reported results at 11:06 p.m.