Democratic presidential candidate Sen. Bernie Sanders on Thursday greeted members of the audience after speaking at Northstar Elementary School in Knoxville, Iowa.
Democratic presidential candidate Sen. Bernie Sanders on Thursday greeted members of the audience after speaking at Northstar Elementary School in Knoxville, Iowa. Andrew Harnik The Associated Press
Democratic presidential candidate Sen. Bernie Sanders on Thursday greeted members of the audience after speaking at Northstar Elementary School in Knoxville, Iowa. Andrew Harnik The Associated Press

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