Incumbents
- President: George W. Bush (Republican)
- Vice President: Dick Cheney (Republican)
- Chief Justice: John Roberts
- Speaker of the House of Representatives: Dennis Hastert (R-Illinois) (until January 3), Nancy Pelosi (D-California) (starting January 4)
- Senate Majority Leader: Bill Frist (R-Tennessee) (until January 3), Harry Reid (D-Nevada) (starting January 3)
- Congress: 109th (until January 3), 110th (starting January 3)
Read more about this topic: 2007 In The United States