https://www.theguardian.com/technology/2017/nov/01/facebook-ads-russia-us-election-fake-news-released-public

Ads released by US lawmakers appear to have targeted both liberals and conservatives on hot-button issues and attempted to sow discord during election

US lawmakers have publicly released a selection of Facebook ads bought by Russian operatives and a list of imposter Twitter accounts, revealing how foreign actors sought to sow division among American citizens.