Lies, smears and scams plaguing social media; Stelter: Trump is 'Mr. Misinformation'; Pro-Trump media claims caravan is a threat; The power of the caravan pictures; Khashoggi's WashPost editor pushes for answers; How media business models fuel polarization; Bernstein: Trump uses lies to push policies To learn more about how CNN protects listener privacy, visit cnn.com/privacy)
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