Nationwide opinion polling for the United States presidential election, 2008 Support likelihood Support likelihood

| Poll_Source | Date_ | Candidate | Support | Consider | Oppose | Unsure |
|---|---|---|---|---|---|---|
| FOX News/Opinion Dynamics Poll | Feb 13–14, 2007 | Hillary Clinton | 18% | 34% | 44% | 3% |
| FOX News/Opinion Dynamics Poll | Feb 13–14, 2007 | Rudy Giuliani | 15% | 44% | 36% | 5% |
| FOX News/Opinion Dynamics Poll | Feb 13–14, 2007 | Barack Obama | 12% | 45% | 34% | 10% |
| FOX News/Opinion Dynamics Poll | Feb 13–14, 2007 | John McCain | 9% | 43% | 40% | 8% |
| FOX News/Opinion Dynamics Poll | Feb 13–14, 2007 | John Edwards | 7% | 39% | 45% | 9% |
| FOX News/Opinion Dynamics Poll | Feb 13–14, 2007 | Newt Gingrich | 7% | 19% | 64% | 9% |
| FOX News/Opinion Dynamics Poll | Feb 13–14, 2007 | Ralph Nader | 3% | 14% | 76% | 8% |
| Newsweek Poll | Nov 9–10, 2006 | Hillary Clinton | 33% | 20% | 45% | 2% |
| Newsweek Poll | Nov 9–10, 2006 | Rudy Giuliani | 24% | 30% | 32% | 4% |