https://phys.org/news/2018-05-cambridge-analytica-sway-election.html > "The idea that Cambridge Analytica could use Facebook likes to predict personalities and use those predictions to effectively target ads strikes me as implausible, given what we know about the significant challenges in persuasion in campaigns," he said. "No evidence has been produced publicly about the firm's profiling or targeting to suggest that its efforts were effective." > Hersh testified alongside Christopher Wylie, a former Cambridge Analytica contractor, and Mark Jamison, a visiting scholar at the American Enterprise Institute, at the Judiciary Committee hearing "Cambridge Analytica and the Future of Data Privacy."