Research 2000 for Daily Kos (3/22-24, likely voters, 2/16-18, 2009 in parentheses):
Patty Murray (D): 51 (53)
Dave Reichert (R): 43 (40)
Undecided: 6 (7)
Patty Murray (D): 52
Dino Rossi (R): 41
Undecided: 7
Patty Murray (D): 54
Don Benton (R): 35
Undecided: 11
Patty Murray (D): 55
Paul Akers (R): 28
Undecided: 17
(MoE: ±4.0%)
There's been emerging conventional wisdom in the last couple months that Dino Rossi poses a threat to Patty Murray in the Washington Senate race, if he gets in. That seems to have entirely two pillars of support holding that up, though: a couple polls from Rasmussen, and another one from Portland-based Republican internal pollster Moore Insight. Research 2000 has a rather different take: Murray has an 11-point lead on Rossi, who, with a 47/47 favorable (thanks to the heavy exposure of losing two contentious gubernatorial races), really doesn't have much more room for growth.
Rep. Dave Reichert (who's generally well-liked and isn't covered in two-time loser stank) is probably the GOP's best bet in Washington, and even he comes up short against Murray -- in fact, thanks to one-year-old trendlines, we can see there's been only a small amount of erosion for Murray, either in the matchup against Reichert or in her favorables (52/41 now, 55/40 then), despite all the craziness of the last year. Murray also easily takes care of two of her actually announced GOP opponents, state Sen. Don Benton and businessman Paul Akers (the only candidate to have advertised so far).
http://www.swingstateproject.com/diary/6647/wasen-murray-with-11point-edge-over-rossi