| Alabama | Riley (R) 55.0% vs. Baxley (D) 35.7% | Chart | Riley +19.3% |
| Arizona | Munsil (R) 31.7% vs. Napolitano (D) 61.7% | Chart | Napolitano +30.0% |
| Arkansas | Hutchinson (R) 40.0% vs. Beebe (D) 53.0% | Chart | Beebe +13.0% |
| California | Arnold S. (R) 51.7% vs. Angelides (D) 37.0% | Chart | Arnold S. +14.7% |
| Colorado | Beauprez (R) 34.8% vs. Ritter (D) 53.5% | Chart | Ritter +18.7% |
| Florida | Crist (R) 49.3% vs. Davis (D) 42.5% | Chart | Crist +6.8% |
| Georgia | Perdue (R) 50.7% vs. Taylor (D) 36.7% | Chart | Perdue +14.0% |
| Illinois | Topinka(R) 35.8% vs. Blagojevich(D)* 44.3% | Chart | Blagojevich +8.5% |
| Iowa | Nussle (R) 44.3% vs. Culver (D) 50.3% | Chart | Culver +6.0% |
| Maine | Woodcock (R) 28.7% vs. Baldacci (D)* 41.0% | Chart | Baldacci +12.3% |
| Maryland | Ehrlich (R)* 46.5% vs. O'Malley (D) 47.8% | Chart | O'Malley +1.3% |
| Massachusetts | Healey (R) 29.5% vs. Patrick (D) 53.8% | Chart | Patrick +24.3% |
| Michigan | DeVos (R) 41.5% vs. Granholm (D)* 51.5% | Chart | Granholm +10.0% |
| Minnesota | Pawlenty (R)* 42.6% vs. Hatch (D) 45.0% | Chart | Hatch +2.4% |
| Nevada | Gibbons (R) 46.3% vs. Titus (D) 42.3% | Chart | Gibbons +4.0% |
| New York | Faso (R) 23.3% vs. Spitzer (D) 69.7% | Chart | Spitzer +46.4% |
| Ohio | Blackwell (R) 37.3% vs. Strickland (D) 56.7% | Chart | Strickland +19.4% |
| Oregon | Saxton (R) 39.3% vs. Kulongoski (D)* 47.7% | Chart | Kulongoski +8.4% |
| Pennsylvania | Swann (R) 36.0% vs. Rendell (D)* 57.8% | Chart | Rendell +21.8% |
| Rhode Island | Carcieri (R)* 50.0% vs. Fogarty (D) 40.3% | Chart | Carcieri +9.7% |
| South Carolina | Sanford (R) 57.3% vs. Moore (D) 35.0% | Chart | Sanford +22.3% |
| Tennessee | Bryson (R) 32.3% vs. Bredesen (D) 60.7% | Chart | Bredesen +28.4% |
| Texas | Perry (R)* 37.3% vs. Bell (D) 23.0% | Chart | Perry +14.3% |
| Wisconsin | Green (R) 42.8% vs. Doyle (D)* 48.8% | Chart | Doyle +6.0% |