Incumbent Democrat Adam Smith and Republican challenger Doug Basler advanced from Washington’s August 2026 top-two primary to contest the November 3 general election in the 9th congressional district. The seat’s D+22 partisan voting index and consistent Solid Democratic or Safe Democratic ratings from forecasters anchor trader expectations of a Democratic victory, with margin-of-victory contracts showing roughly even pricing across multiple buckets near 38 percent. Limited recent district-specific polling and the absence of major late-cycle developments have kept probabilities clustered, as traders weigh historical margins in this safely Democratic area against potential shifts from national political conditions, turnout patterns, or candidate-specific events before Election Day.