Threat intelligence firm Alethea identified the Doppelgänger influence campaign as being operated by the Russian public relations firm Agency for Social Design, which is sanctioned by the U.S. and EU.

From the articleRussia suspected of an online influence campaign ahead of important elections in the United States | УННAlso in "Russia Appears to Step Up Efforts to Influence U.S. Voters" (And U.S. Intelligence Officials Could Not Establish a Secure Connection to Brief State Election Personnel!) #ELB