| President Republican - District 15 | 100.% ( 336 of 336 ) precincts reporting as of Mar 4, 2008, at 9:49 a.m. County Returns Other Contests | | Districtwide Results | |
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| | Mike Huckabee (Rep) | 4,301 | 10.0 % |   |
| | Duncan Hunter (Rep) | 127 | 0.2 % |   |
| | Alan Keyes (Rep) | 175 | 0.4 % |   |
| | Sam Brownback (Rep) | 31 | 0.0 % |   |
| | John H. Cox (Rep) | 50 | 0.1 % |   |
| | Rudy Giuliani (Rep) | 2,565 | 6.0 % |   |
| | John McCain (Rep) | 21,553 | 50.0 % |   |
| | Ron Paul (Rep) | 2,298 | 5.4 % |   |
| | Mitt Romney (Rep) | 11,074 | 25.7 % |   |
| | Tom Tancredo (Rep) | 59 | 0.1 % |   |
| | Fred Thompson (Rep) | 908 | 2.1 % |   |
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