Panel hears how data firm exploited vulnerabilities of 2016 voters

Cambridge Analytica whistleblower Christopher Wylie, middle, and two other panelists are sworn in at a Senate Judiciary hearing. Photo by Elizabeth Hewitt/VTDigger
WASHINGTON — The man who blew the whistle on a private firm’s collection and retention of millions of people’s personal data through Facebook warned lawmakers about the use of data to influence the public at a hearing Wednesday.
Christopher Wylie, a former contractor with the firm Cambridge Analytica, revealed earlie