Disinformation is one the biggest challenges of modern politics – especially in campaigning. How can candidates spread their message if almost anyone can distort it? Journalist Sasha Issenberg’s new book “The Lie Detectives: In Search of a Playbook for Winning Elections in the Disinformation Age” dives deep into this topic. He joins CNN Political Director David Chalian to discuss what he's learned about the people fighting fake news, and whether there are ways of preventing it.

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