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iowa caucuses hillary clinton bernie sanders entrance polls chalian ac_00001726
iowa caucuses hillary clinton bernie sanders entrance polls chalian ac_00001726

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    Iowa caucuses: Why the Democratic race is so close

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Iowa caucuses: Why the Democratic race is so close

CNN Political Director David Chalian looks at two entrance polls that may explain why the race between Hillary Clinton and Sen. Bernie Sanders is so close.

Iowa caucuses: Why the Democratic race is so close

CNN Political Director David Chalian looks at two entrance polls that may explain why the race between Hillary Clinton and Sen. Bernie Sanders is so close.