While serving as vice president of Cambridge Analytica, a data-analytics company largely funded by the Mercer family, Steve Bannon became connected to one of the most consequential political-data controversies of the 2010s. The firm obtained information on millions of Facebook users through methods that did not involve their informed consent and used the resulting profiles to target voters in the 2016 United States presidential campaign and in the Brexit campaign. Former employee Christopher Wylie described the operation as a kind of 'psychological warfare tool' and said Bannon oversaw aspects of the data-collection effort. Bannon was paid more than $125,000 for his work and reportedly held a stake valued between $1 million and $5 million, which he sold after joining the Trump administration in 2017. The scandal exploded publicly after investigations revealed how personality data, online behavior, and political messaging could be fused into highly targeted campaigns, prompting international scrutiny of Facebook, Cambridge Analytica, and the ethics of modern elections.
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