Russian trolls and hackers targeted social media networks, political organizations and state election systems during the 2016 election. Here's what we know about the Kremlin's playbook for creating division in the U.S. Subscribe to The Washington Post on YouTube: bit.ly/2qiJ4dy Follow us: Twitter: twitter.com/washingtonpost Instagram: www.instagram.com/washingtonpost/ Facebook: www.facebook.com/washingtonpost/