Sondagens Nacionais - 15/05/2008
15 05 2008| Race | Poll | Results | Spread |
| Democratic | Gallup Tracking | Obama 50, | Obama +6.0 |
| Democratic | Rasmussen Tracking | Obama 50, | Obama +9.0 |
| General Election: | POS/GQR | Clinton 45, | McCain +1.0 |
| General Election: | POS/GQR | Obama 48, | Obama +5.0 |










