Will be interesting to see what happens in the WA State Senate next year I expect the two turnover Dems to be easily defeated but the Rs there may be able to hold a narrow outright majority.
And losses are almost guaranteed in CO I expect the State Senate to flip and some losses in the House not enough to flip the chamber but significant.
Tim Sheldon is very difficult to defeat (in fact, because of his rather conservative voting record, local liberal Democrats frequently tried to primary him, and always lost). Rodney Tom? More likely, but he is not easy target either - a former moderate Republican, who, later, switched (becoming a very moderate Democrat) and defeated Republican state Senator who was Minority Floor Leader.
In addition - Washington, with "top 2" system, doesn't have "primaries" now. And both Sheldon and Tom will get strong Indie and substantial Republican support