It denies using any Facebook data in the campaign. Facebook denies that the harvesting of tens of millions of profiles by Cambridge Analytica, working with Cambridge academic Aleksandr Kogan and his company Global Science Research (GSR), was a data breach. “Facebook knew about this, and the involvement of Cambridge Analytica with it.”Cambridge Analytica responded to the Observer story on Twitter before Collins had said Nix would be recalled. “Reality Check: Cambridge Analytica uses client and commercially and publicly available data; we don’t use or hold any Facebook data,” the company said. “When we learned GSR sold us Facebook data that it shouldn’t have done, we deleted it all – system wide audit to verify.”

Source: The Guardian March 18, 2018 10:24 UTC