Washington is unique, as votes are processed by mail-in ballots only. As such, the process of tallying the results is not as simple as some locations with computerized voting or voting at the polls.
Patty Murray is the incumbent, and right now she's leading - although narrowly - over her opponent Dino Rossi.
The Democrats need to hold on to the state of Washington in the Senate to avoid any further losses. So far, several Senate races have gone red.
Below see a video about Washington Election results, Dino Rossi vs Patty Murray.