| MAY 2008 | |
| 3 | Guam caucuses |
| 6 | Indiana and North Carolina primaries |
| 13 | West Virginia Democratic primary |
| West Virginia GOP primary (1/3 selected) | |
| 20 | Kentucky and Oregon primaries |
| 27 | Idaho Republican primary |
| JUNE 2008 | |
| 1 | Puerto Rico Democratic primary |
| 3 | Montana Democratic primary |
| New Mexico Republican primary | |
| South Dakota primary | |
| AUGUST 2008 | |
| 25-28 | Democratic National Convention in Denver |
| SEPTEMBER 2008 | |
| 1-4 | Republican National Convention in Minneapolis-St. Paul |
| 26 | Presidential debate in Oxford, Miss. |
| OCTOBER 2008 | |
| 2 | Vice Presidential debate in St. Louis, Mo. |
| 7 | Presidential debate in Nashville, Tenn. |
| 15 | Presidential debate in Hempstead, N.Y. |
| NOVEMBER 2008 | |
| 4 | Election Day |