The Russians launched hundreds of Facebook ads, reaching millions of people in critical swing states. Thirty-five of the 55 ads targeting Wisconsin ran during the primary. More ads targeted DC than Pennsylvania. More of the geographically targeted ads ran in 2015 than in 2016. The unusual possibilities offered by Facebook targeting can help contribute to the sense that the Russians did something especially clever.

Source: Washington Post December 28, 2017 20:50 UTC