Trump declared ‘economic warfare’ on Iran. What does that mean for Americans?

On social media, President Trump announced he'll launch “economic warfare and isolation” against Iran. We talk to Edward Fishman, senior fellow and director of the Maurice R. Greenberg Center for Geoeconomics at the Council on Foreign Relations, about what economic warfare is and the downstream consequences it'll have on both Americans and also the global economy. Then, Trump had threatened to…