Sen. Barack Obama claimed a significant victory in the South Carolina Democratic primary on Saturday, telling supporters "we are hungry for change."

The Illinois senator earned more than twice the vote that rival Sen. Hillary Clinton did, 55 percent to 27 percent, unofficial returns showed.

Former Sen. John Edwards was third with 18 percent. Read full article »

CNN's Paul Steinhauser, Bill Schneider, Peter Hamby, Alexander Mooney, Suzanne Malveaux and Jessica Yellin contributed to this report.

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