Former Alaska Senator Mike Gravel, who recently abandoned the Democrats to join the Libertarian Party, was eliminated after he placed fourth with 73 votes in the initial balloting. Gravel, ever gracious in defeat, indicated that this would be the end of his accomplished political career, saying, "I just ended my political career. From 15 years old to now, my political career is over, and it's no big deal. I'm a writer, I'm a lecturer, I'm going to push the issues of freedom and liberty. I'm going to push those issues until the day I die."

Senator Gravel became disillusioned with the Democratic Party after he was excluded from all but the earliest presidential debates after failing to meet fund-raising and/or polling requirements. He said the Democratic Party no longer represented his values because of its support of the Iraq War, the military-industrial complex, and American imperialism.

Senator Gravel will be remembered for his awakening of the America's collective conscience when he read 4100 pages of the text of the Pentagon Papers into the Senate record of his Subcommittee on Public Buildings and Grounds. The importance of recording the Papers to the Congressional Record was that, Article I, Section 6 of the United States Constitution provides that "for any Speech or Debate in either House, [a Senator or Representative] shall not be questioned in any other Place", thus the Senator could not be prosecuted for anything said on the Senate floor, and, by extension, for anything entered to the Congressional Record, allowing the Papers to be publicly read without threat of a treason trial and conviction.

Among a host of other governmental wrongdoings, the Pentagon Papers revealed that the US deliberately expanded its war with airstrikes against Laos, coastal raids of North Vietnam, and U.S. Marine Corps attacks - before President Lyndon B. Johnson informed the American public, though promising to not expand the war.

The Gravel for President 2008 Campaign mailed the following message to supporters of Mr. Gravel:

I would like to congratulate Mike Gravel for his years of dedicated public service and I wish for him to enjoy the peace he has sought to bring the American people through his courageous career.