https://www.washingtonpost.com/news/the-switch/wp/2018/03/20/ftc-opens-investigation-into-facebook-after-cambridge-analytica-scrapes-millions-of-users-personal-information/

The Federal Trade Commission probe — confirmed by a source familiar with the agency's thinking and not authorized to speak on the record — marks the most substantial political and legal threat yet to Facebook as it grapples with the fallout from Cambridge Analytica and its controversial tactics. And it could result in the U.S. government slapping Facebook with a fine that might reach into millions, if not billions, of dollars.