Russia’s ‘troll factory’ impersonates Americans to sow political chaos. How can the U.S. fight it?

Russia’s attempts to interfere in American elections and political discourse did not end with the 2016 race. What do we know about Moscow’s meddling and what can we expect in the near future? Judy Woodruff learns more from Nina Jankowicz, a Russian disinformation analyst, about how it works, what we should be worried about and what average Americans can do in response.