But to earn the crown as the "first" -- whatever that means, and Kucinich's campaign wouldn't clarify -- is a more nuanced privilege.
Was he the first person? No. Was he the first Congressman? No. Was he the first presidential candidate? No (Correct answer: Republican Ron Paul). Was he the first Democratic presidential candidate? Yes.
According to the Congressional Record, the Cleveland Democrat first spoke against the war in the context of Iraq in remarks made March 20, 2002. Kucinich advocated peace and warned against the slippery slope of nuclear weapons. (Paul spoke out on Nov. 29, 2001 saying "the argument that (Saddam) Hussein is producing weapons of mass destruction is the reddest of all herrings," according to the Congressional Record.)
But Kucinich earned the title as the leader of the anti-war movement in late August 2002 after holding a widely reported Capitol Hill briefing where he called for more "discussion about why we should not go to war," according to an article in the Cleveland Plain Dealer. He then began building a congressional coalition against the war.
"Unilateral military action by the United States against Iraq is unjustified, unwarranted and illegal," said Kucinich, according to The Washington Times on Sept. 20, 2002. "The administration has failed to make the case that Iraq poses an imminent or immediate threat to the United States."
Kucinich solidified his position as the opposition headmaster Oct. 3, 2002, when he took the floor of the House to present an eight-page, point-by-point analysis refuting the joint resolution on Iraq in the days before the vote.