“The major themes the bots have been pushing are the ‘both sides are violent’ argument and conspiracy theories that George Soros was behind the counter-protests.”

The latest Soros accusation, which PolitiFact found to be baseless, shows another aspect of how messages snowball as they pass between the American right-wing and Russian propagandists. 

A U.S. right-winger asserts a “fact,” a Russian news agency fuses it with a Kremlin narrative, and then American right-wing websites parrot the Russian news agency’s assertion.

Thus the Trumpist echo chamber.