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linkhttps://www.pewresearch.org/our-methods/ calendar_today09-02-2015 22:00:41

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Pew Research Methods
@pewmethods

a year ago

Predicting who will vote is critical – and difficult. Preelection polls face one crucial challenge that routine opinion polls do not: determining who of the people surveyed will actually cast a ballot. Read more: pewresearch.org/short-reads/20…