Thousands of Iowans wait for US Democratic Presidential candidate Senator Barack Obama (D-IL) to appear on the campaign trail for the first time with entertainer and talk show host Oprah Winfrey at a campaign rally in the Hy-Vee hall in Des Moines, Iowa December 8, 2007. Iowa holds the first-in-the-nation caucuses for the 2008 Presidential election on January 3. [Agencies]