The Facebook and Cambridge Analytica scandal threw new light on Trump’s 2016 election campaign and the data harvesting it involved. But travel back to February 2012 and you will find Ed Pilkington and Amanda Michel writing in The Guardian about the Obama campaign’s use of social media data to ensure re-election.

The Guardian is the world's leading liberal voice providing independent analysis and investigative journalism on current topics like environment, art, and human rights.

Obama, Facebook and the power of friendship: the 2012 data election

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