| President Republican - District 31 | 100.% ( 212 of 212 ) precincts reporting as of Mar 4, 2008, at 9:49 a.m. County Returns Other Contests | | Districtwide Results | |
| |
| | Mike Huckabee (Rep) | 1,209 | 11.8 % |   |
| | Duncan Hunter (Rep) | 118 | 1.1 % |   |
| | Alan Keyes (Rep) | 150 | 1.4 % |   |
| | Sam Brownback (Rep) | 34 | 0.3 % |   |
| | John H. Cox (Rep) | 56 | 0.5 % |   |
| | Rudy Giuliani (Rep) | 418 | 4.0 % |   |
| | John McCain (Rep) | 4,964 | 48.2 % |   |
| | Ron Paul (Rep) | 800 | 7.8 % |   |
| | Mitt Romney (Rep) | 2,426 | 23.6 % |   |
| | Tom Tancredo (Rep) | 46 | 0.4 % |   |
| | Fred Thompson (Rep) | 95 | 0.9 % |   |
|   |
|