Kucinich, 61, is facing four challengers in the Democratic congressional primary March 4. Rival Joe Cimperman has been critical of Kucinich for focusing too much time outside of his district while campaigning for president. The Ohio congressman brought the same sense of idealism to his second run for president as he did in his first bid four years ago. He said he entered the race again because the Democratic Party wasn't pushing hard enough to end the Iraq war. His candidacy was supported by many Hollywood celebrities, including actor Sean Penn.

During his tenure in Congress, Kucinich has been one of the most outspoken liberals, opposing international trade agreements like the North America Free Trade Agreement and marching with protesters in Seattle during a meeting of the World Trade Organization.

As a presidential candidate, he has proposed a Department of Peace, backed universal health care and supported gay marriage. He also pushed for the impeachment of Vice President Dick Cheney.