Sondagens Nacionais - 18/05/2008
18 05 2008| Race | Poll | Results | Spread |
| Democratic | Gallup Tracking | Obama 52, | Obama +11.0 |
| Democratic | Rasmussen Tracking | Obama 46, | Obama +2.0 |
| Race | Poll | Results | Spread |
| Democratic | Gallup Tracking | Obama 52, | Obama +11.0 |
| Democratic | Rasmussen Tracking | Obama 46, | Obama +2.0 |
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