What would you say is the biggest threat to America today? It might not be what you think. Many of America's senior leaders, especially the ones in the Democratic Party, believe that it's the insidious, intentional assault on our brains, from people using technology to pump them full of misinformation and disinformation. The torrent of lies may be making it impossible for democracy to function anymore, and is putting some of the worst possible people in power.

Journalist Sasha Issenberg takes us inside this world in his new book The Lie Detectives, and joins us to explain what they've found out about how to fight this new war for information, truth, and democracy.

01:13 The Oh Gosh Moment: Realizing the Scale of Disinformation

16:18 Jiore Craig's Mission: Adapting Political Strategies for the Digital Age

30:49 Understanding the Ecosystem of Disinformation

41:25 The Future of Fighting Disinformation: Challenges and Optimism