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Anderson Cooper 'overpreparing' for the Democratic debate_00022017
Anderson Cooper 'overpreparing' for the Democratic debate_00022017

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    Anderson Cooper 'overpreparing' for Democratic debate

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Anderson Cooper 'overpreparing' for Democratic debate

Anderson Cooper, moderator of CNN's Democratic debate, previews his strategy for questioning Hillary Clinton, Bernie Sanders and the other candidates.

Anderson Cooper 'overpreparing' for Democratic debate

Anderson Cooper, moderator of CNN's Democratic debate, previews his strategy for questioning Hillary Clinton, Bernie Sanders and the other candidates.