“I wasn't in the room with the president and Mr. Tenet. But I can tell that you that the people who were working against Osama bin Laden were assured from the first day that much of the work we had done in the last decade would be undone by that war.”

September 6, 2012 John Kerry’s speech to the Democratic National Convention, 2012 http://www.washingtonpost.com/politics/dnc-2012-john-kerrys-speech-to-the-democratic-national-convention-full-text/2012/09/06/bb73367e-f87c-11e1-a073-78d05495927c_story.html

Democratic presidential candidate debate, Detroit (26 October 2003)

Interview with Chris Wallace, FOX News Sunday, September 24, 2006. Transcript: William Jefferson Clinton on 'FOX News Sunday' http://www.foxnews.com/story/0,2933,215397,00.html
2000s

Roundtable discussion on PBS regarding Islam--April 14th 2006, answering a question posed by Ray Suarez.
2000s

July 01, 2007 http://littlegreenfootballs.com/weblog/?entry=26090_Daily_Kos_Kid_Gives_Shout_Out_to_Idiots&only

Statement indicating his opposition to Clark Clifford's advice to Harry S Truman for the US recognition of the state of Israel prior to UN decisions on the partitioning of Palestine, in official State Department records. (12 May 1948)
If you follow Clifford's advice and if I were to vote in the election, I would vote against you.
Marshall's statement as quoted by Clark Clifford in The New Yorker (25 March 1991)

Hardball with Chris Matthews, November 16 2004.
2000s

This misquotation is frequently attributed to a White House press conference, March 13, 2002 http://georgewbush-whitehouse.archives.gov/news/releases/2002/03/20020313-8.html
Correct quote should read: "And, again, I don't know where he [Osama Bin Laden] is. I — I'll repeat what I said. I truly am not that concerned about him."
The relevant parts of the White House transcript reads:
: THE PRESIDENT: Deep in my heart I know the man is on the run, if he's alive at all. Who knows if he's hiding in some cave or not; we haven't heard from him in a long time. And the idea of focusing on one person is — really indicates to me people don't understand the scope of the mission. Terror is bigger than one person. And he's just — he's a person who's now been marginalized. His network, his host government has been destroyed. He's the ultimate parasite who found weakness, exploited it, and met his match. He is — as I mentioned in my speech, I do mention the fact that this is a fellow who is willing to commit youngsters to their death and he, himself, tries to hide — if, in fact, he's hiding at all. So I don't know where he is. You know, I just don't spend that much time on him, Kelly, to be honest with you. I'm more worried about making sure that our soldiers are well-supplied; that the strategy is clear; that the coalition is strong; that when we find enemy bunched up like we did in Shahikot Mountains, that the military has all the support it needs to go in and do the job, which they did.
: Q: But don't you believe that the threat that bin Laden posed won't truly be eliminated until he is found either dead or alive?
: THE PRESIDENT: Well, as I say, we haven't heard much from him. And I wouldn't necessarily say he's at the center of any command structure. And, again, I don't know where he is. I — I'll repeat what I said. I truly am not that concerned about him. I know he is on the run. I was concerned about him, when he had taken over a country. I was concerned about the fact that he was basically running Afghanistan and calling the shots for the Taliban.
Attributed, Misquotations