Trumpcast: Cyberwar and Security in the Trump Era

Jacob Weisberg talks to Clint Watts, the author of Messing with the Enemy: Surviving in a Social Media World of Hackers, Terrorists, Russians, and Fake News, about the question of cyberwar. What is it? What counts? Does the United States have a clear strategy around it? And what's some basic internet hygiene we all can practice for safe surfing? Plus, John Di Domenico returns with the weekend's tweets.