Understanding Vaccine Safety and Efficacy Amidst Concerns

Not only has the scandal over Trump officials discussing military plans in a group chat on an insecure commercial platform made the Trump administration look like fools to Americans paying attention, but overseas allies are drawing conclusions about the risk of sharing intelligence with America when its top officials are so careless with sensitive data. Alexander Ward, national security reporter for the Wall Street Journal, talks with Rachel Maddow about his reporting that it was actually an Israeli intelligence asset that was exposed by the sloppiness of the Trump officials' group chat.