| Results Tracker for CD21 | |||
|---|---|---|---|
| Date | Candidate | Votes | Percent |
| 2012-11-08 | David G. Valadao (R) | 49,205 | 59.90% |
| 2012-11-08 | John Hernandez (D) | 32,967 | 40.10% |
| 2012-11-10 | David G. Valadao (R) | 49,205 | 59.90% |
| 2012-11-10 | John Hernandez (D) | 32,967 | 40.10% |
| 2012-11-11 | David G. Valadao (R) | 49,205 | 59.90% |
| 2012-11-11 | John Hernandez (D) | 32,967 | 40.10% |
| 2012-11-12 | David G. Valadao (R) | 49,205 | 59.90% |
| 2012-11-12 | John Hernandez (D) | 32,967 | 40.10% |
| 2012-11-16 | David G. Valadao (R) | 60,396 | 59.00% |
| 2012-11-16 | John Hernandez (D) | 42,017 | 41.00% |
| 2012-11-20 | David G. Valadao (R) | 60,950 | 58.70% |
| 2012-11-20 | John Hernandez (D) | 42,827 | 41.30% |
| 2012-11-21 | David G. Valadao (R) | 62,039 | 58.70% |
| 2012-11-21 | John Hernandez (D) | 43,739 | 41.30% |
| 2012-11-28 | David G. Valadao (R) | 63,849 | 58.10% |
| 2012-11-28 | John Hernandez (D) | 45,969 | 41.90% |
| 2012-11-29 | David G. Valadao (R) | 64,253 | 58.10% |
| 2012-11-29 | John Hernandez (D) | 46,380 | 41.90% |
| Current | David G. Valadao (R) | 67,164 | 57.80% |
| Current | John Hernandez (D) | 49,119 | 42.20% |
| Change | Change in Votes | Percentage Change | |
| Increase from Election Day Results | David G. Valadao (R) | 17,959 | 36.5% |
| Increase from Election Day Results | John Hernandez (D) | 16,152 | 49.0% |