Iowa Caucuses (36 images)

Democratic presidential hopeful Sen. Barack Obama (D-IL) addresses supporters at a victory rally in Des Moines, Iowa on January 3, 2008. Obama emerged with a clear win over rivals John Edwards and Hillary Clinton in the Democratic caucus. (UPI Photo/Mark Cowan)

Democratic presidential hopeful Sen. Barack Obama (D-IL) addresses supporters at a victory rally in Des Moines, Iowa on January 3, 2008. Obama emerged with a clear win over rivals John Edwards and Hillary Clinton in the Democratic caucus. (UPI Photo/Mark Cowan)

Democratic presidential hopeful Sen. Barack Obama (D-IL) campaigns in Coralville, Iowa on January 2, 2008. (UPI Photo/David Banks)

Democratic presidential hopeful Sen. Barack Obama (D-IL) and his wife Michelle, and children Malia (L) and Sasha greet supporters at a victory rally in Des Moines, Iowa on January 3, 2008. Obama emerged with a clear win over rivals John Edwards and Hillary Clinton in the Democratic caucus. (UPI Photo/Mark Cowan)