How Trump Consultants Exploited the Facebook Data of Millions

LONDON — As the upstart voter-profiling company Cambridge Analyticaprepared to wade into the 2014 American midterm elections, it had a problem. The firm had secured a $15 million investment from Robert Mercer, the wealthy Republican donor, and wooed his political adviser, Stephen K. Bannon, with the promise of tools that could identify the personalities of American voters and influence their behavior. But it did not have the data to make its new products work. So the firm harvested private information from the Facebook profiles…LIRE LA SUITE