The New York Times and The Guardian revealed that the data analysis company Cambridge Analytica – who handled Donald Trump’s digital election campaign – used unauthorized collection of personal data to reach over 50 million Americans on Facebook. The analyst came over the data by allowing users to participate in personality tests via an app. Donald Trump paid over 50 million for the services.

Read more here: https://www.theguardian.com/news/2018/mar/17/cambridge-analytica-facebook-influence-us-election and here: https://www.nytimes.com/2018/03/17/us/politics/cambridge-analytica-trump-campaign.html