https://www.cnet.com/news/facebook-cambridge-analytica-data-mining-and-trump-what-you-need-to-know/

Consultants working for Donald Trump's presidential campaign exploited the personal Facebook data of millions.

That's the key message in Saturday stories by The New York Times and the UK's Guardian and Observer newspapers, as well as in statements from Facebook. The stories and statements indicate the social networking giant was duped by researchers, who reportedly gained access to the data of more than 50 million Facebook users, which was then misused for political ads during the 2016 US presidential election.