Oregon Democratic primary elections, 2008 Polling Minor

| Source_ | Date_ | Goberman | Loera | Merkley | Neville | Novick | Obrist | Other_Undecided |
|---|---|---|---|---|---|---|---|---|
| SurveyUSA | May 16–May 18, 2008 | 2% | 2% | 34% | 7% | 37% | 2% | 17% |
| SurveyUSA | May 9–May 11, 2008 | 2% | 2% | 31% | 11% | 27% | 2% | 24% |
| Davis, Hibbitts & Midghall | May 8–May 10, 2008 | 1% | 1% | 21% | 0% | 26% | 3% | 43% |
| SurveyUSA | April 28–April 30, 2008 | 2% | 2% | 28% | 8% | 30% | 4% | 26% |
| SurveyUSA | April 4–April 6, 2008 | 3% | 6% | 11% | 12% | 23% | 5% | 40% |