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ATLANTA, GA - JANUARY 20: U.S. Senator Barack Obama (D-IL) addresses Ebenezer Baptist Church January 20, 2008 in Atlanta, Georgia. Ebenezer's pastor Rev. Raphael Warnock (R) stands next to him. Obama was defeated by Sen. Hillary Clinton (D-NY) in the Nevada Caucus yesterday. (Photo by Barry Williams/Getty Images)

ATLANTA, GA - JANUARY 20: U.S. Senator Barack Obama (D-IL) addresses Ebenezer Baptist Church January 20, 2008 in Atlanta, Georgia. Ebenezer's pastor Rev. Raphael Warnock (R) stands next to him. Obama was defeated by Sen. Hillary Clinton (D-NY) in the Nevada Caucus yesterday.  (Photo by Barry Williams/Getty Images)