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(L-R) Volunteers for U.S. Presidential Hopeful Barack Obama (D-IL) and U.S. Presidential hopeful Hillary Clinton (D-NY) prepare their candidate's sign outside the Iowa Brown & Black Presidential Forum in North High School in Des Moines, IA, on Dec. 1, 2007. The forum gathered opposing democratic candidates with a month left until the Iowa caucus. Photo by: Yana Paskova for The New York Times