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sot.velshi.cooper.cnn.after.dark_00004418

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    #CNNAfterDark trends on Twitter

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#CNNAfterDark trends on Twitter

CNN coverage of the Iowa caucuses goes into the early morning hours, sparking the Twitter trend #CNNAfterDark.

#CNNAfterDark trends on Twitter

CNN coverage of the Iowa caucuses goes into the early morning hours, sparking the Twitter trend #CNNAfterDark.