Whistleblower Christopher Wylie details how Cambridge Analytica siphoned Facebook profile data through quiz apps, reigniting debates over consent, psychographic targeting, and the firm’s work for the Trump campaign and other right-wing causes worldwide.

The scandal triggers congressional hearings, FTC fines, and platform policy changes, galvanizing cross-partisan calls for privacy regulation and forcing campaigns to rethink how they acquire voter data in a post-2016 environment.