 | [Candidate names rotated] If you were filling out your ballot for US Senate right now, would you vote for Republican Dino Rossi? Or, Democrat Patty Murray? |
| TRACK POINTS | 08/20/10 | 09/22/10 | 10/15/10 | 10/28/10 | n/a | n/a | n/a | n/a | n/a |
| ± 4% | ± 4.1% | ± 4.1% | ± 3.8% | n/a | n/a | n/a | n/a | n/a |
| ALL | ALL | ALL | ALL | n/a | n/a | n/a | n/a | n/a |
| Rossi (R) | 52% | 48% | 47% | 47% | n/a | n/a | n/a | n/a | n/a |
| Murray (D) | 45% | 50% | 50% | 47% | n/a | n/a | n/a | n/a | n/a |
| Undecided | 3% | 3% | 3% | 6% | n/a | n/a | n/a | n/a | n/a |
| Total | 100% | 100% | 100% | 100% | n/a | n/a | n/a | n/a | n/a |