Steven Hassan explains "The Cult of Trump"

Steven Hassan, a leading cult expert with firsthand experience escaping the Unification Church, says Trump's cultivation of his base is cult-like. Brian Stelter questions Hassan's claims and asks why he has decided to branch into politics through the new book "The Cult of Trump." They discuss how social media has accelerated the spread of influential ideologies and "destructive cults," and the pivotal roles played by media and religion.

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