Few people understand the far-left extremist group Antifa as well as investigative journalist Andy Ngo, author of “Unmasked: Inside Antifa's Radical Plan to Destroy Democracy.” He has been beaten, attacked, and nearly killed by Antifa for his undercover reporting of the group’s operations. In an executive order signed on Sept. 22, President Donald Trump designated the group a domestic terrorist organization. On Oct. 8, the president hosted a roundtable focused on Antifa and invited Ngo and other journalists to participate. In this episode, Ngo recounts his harrowing personal experiences. What will it take to actually dismantle Antifa? How is Antifa...