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Marquette University

Flaws in polling data exposed as US campaign season heats up

Polls for the 2016 U.S. presidential race have been defying all expectations: Donald Trump as the persistent Republican front-runner even as he insults large swaths of the country and brushes off policy questions; Hillary Clinton haunted by an email controversy Democrats shrug off while a Vermont socialist keeps gaining on her.tmpplchld Are the polls correct? While that is hardly a new question, doubts are intensifying after a series of high-profile misfires around the world in the past year, notably in Greece, Israel and the U.K. As politics and business lean increasingly on surveys and data, technological and social shifts are combining to challenge polls' reliability in an entirely...