There is no doubt now how Russia targeted the Americans with social media ads during the 2016 elections. And this has come out during the Mueller investigations.
Democrats on the House intelligence committee have released more than 3,500 Facebook ads that were created or promoted by a Russian internet agency, providing the fullest picture yet of Russia’s attempt to sow racial and political division in the United States before and after the 2016 election.Most of the ads are issue-based, pushing arguments for and against immigration, LGBT issues and gun rights, among other issues. A large number of them attempt to stoke racial divisions by mentioning police brutality. (Source: PBS NewsHour)
This visual shows very clearly which areas were specifically targeted for the best results.
The data is from the United States House of Representative’s Permanent Select Committee on Intelligence.