A look at data brokers selling campaigns "comprehensive" profiles on potential voters, including phone geolocation data gleaned from real-time ad auctions (Jon Keegan/The Markup)

Jon Keegan / The Markup:
A look at data brokers selling campaigns “comprehensive” profiles on potential voters, including phone geolocation data gleaned from real-time ad auctions  —  Before you got in line on Election Day, the emerging and largely unregulated political tracking industry was able to trace your movements

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