Congressional investigations and media reports are shedding light on ways Russians use social media to cause division and chaos in the U.S. Why it matters: The revelation that Russian actors meddled in the 2016 election through Facebook ads have led to intense scrutiny into how social media was leveraged to sow chaos and create divisions among Americans. As congressional investigations ramp up and details leak out, a clearer picture is emerging of the tactics used to interfere with American democracy. Impersonating identities: The Daily Beast reports that Kremlin trolls stole the identity of United Muslims of America (a real organization),...