The 2004 presidential campaign of Dennis Kucinich, House Representative of Ohio and former mayor of Cleveland, began in February 2003, with a formal announcement made in June.

"[2] On December 10, 2003, the American Broadcasting Company (ABC) announced the removal of its correspondents from the campaigns of Kucinich, Carol Moseley Braun and Al Sharpton.

In the Mini-Tuesday primaries Kucinich finished near the bottom in most states, with his best performance in New Mexico where he received less than six percent of the vote, and still no delegates.

Kucinich campaigned heavily in Oregon, spending thirty days there during the two months leading up to the state's May 18 primary.

He continued his campaign because "the future direction of the Democratic Party has not yet been determined"[6] and chose to focus on Oregon "because of its progressive tradition and its pioneering spirit.

Even after Kerry won enough delegates to secure the nomination, Kucinich continued to campaign up until just before the convention, citing an effort to help shape the agenda of the Democratic Party.