FIRST PUBLISHED IN DECEMBER 16, 2016 IN GERMAN IN DAS MAGAZIN.
PUBLISHED IN ENGLISH ON JANUARY 28, 2017 IN MOTHERBOARD:

How Cambridge Analytica used your Facebook data to help the Donald Trump campaign in the 2016 election.

Source: The Data That Turned the World Upside Down – Motherboard
Good God. The U.S. media is so full itself that it missed this story in broad daylight since January 2017.  Quite frankly, U.S. media has rendered itself utterly useless.
Guess I need to be reading Motherboard. They had the story more than a year ago.