| Name | Talks About Running | Set up Explore Committee | Announces Presidential Bid | Out of the Game |
| Republican | ||||
| Brownback | X | 12/4/06 | 12/20/07 | |
| Cox | X | |||
| Gingrich | X | (wait and see) | ||
| Giuliani | X | 11/20/06 | ||
| Hagel | X | (wait and see) | ||
| Huckabee | X | 1/27/07 | 1/28/07 | |
| Hunter | X | 1/12/01 | 1/25/07 | |
| McCain | X | 11/15/06 | 11/15/06 | |
| Pataki | X | (wait and see) | ||
| Paul | X | 1/11/07 | 3/12/07 | |
| Tancredo | X | 1/16/07 | 4/2/07 | |
| Romney | X | 1/3/07 | 1/3/07 | |
| F. Thompson | [Announcement expected in Sept] | |||
| T. Thompson | X | 12/15/06 | 4/4/07 | |
| Allen | X | ---- | ---- | No start |
| Frist | X | ---- | ---- | 11/29/07 |
| Gilmore | X | 1/9/07 | 1/9/07 | 7/14/07 |
| Keating | X | ---- | ---- | 1/18/07 |
| Santorum | X | ---- | ---- | No start |
| Independent | ||||
| Bloomberg | X | |||
| Green Party | ||||
| Nader | X | |||
| Democrat | ||||
| Biden | X | ---- | 1/7/07 | |
| Clark | X | (wait and see) | ||
| Clinton | X | 1/20/07 | 1/22/07 | |
| Dodd | X | ---- | 1/10/07 | |
| Edwards | X | 1/3/07 | ||
| Gore | X | (wait and see) | ||
| Gravel | X | ---- | 4/4/06 | |
| Kucinich | X | ---- | 12/29/06 | |
| Obama | X | 1/16/07 | 2/10/07 | |
| Richardson | X | 1/22/07 | 1/22/07 | |
| Sharpton | X | (wait and see) | ||
| Daschle | X | ---- | ---- | No start |
| Bayh | X | 12/3/06 | ---- | 12/16/06 |
| Feingold | X | ---- | ---- | 11/12/06 |
| Kerry | X | 1/24/07 | ||
| Vilsack | X | ---- | 11/9/06 | 2/23/07 |
| Warner | X | ---- | ---- | 10/12/06 |