The goal, part of the Russian playbook for decades, was to sow chaos by posting content on both sides of the racial divide.
Indeed, no single group of Americans was targeted by IRA information operatives more than African-Americans, concluded a report from the Senate intelligence committee.
They fear the Trump administration's decision to limit what it tells Congress and by extension the American people about election threats will allow the propaganda to spread.
The intelligence statement did not offer specifics about what tactics Russia is using, but the past provides important clues.
What people need to be looking for is stuff that is seemingly trying to get a rise out of them, Jankowicz said.