Yesterday the word came down that Dino Rossi is in fact entering the Senate race against Patty Murray in Washington. Additionally, we have a University of Washington poll for May on the race that also came out the same day.
Let's see how he's starting out.
Previous polls had shown him only slightly behind Murray, and the UofW poll shows no different. Murray leads 44-40, with a margin of error 3.9. That puts Rossi at a 30% chance of being ahead per my model.
Rossi starts off behind, but campaigning should be expected to change that since Murray has been running for re-election all along, but Rossi has been sitting out. It's a race in Washington.