The Washington Post, September 27, 2019 (by subscription)
Laura Edelson is a doctoral student in the Department of Computer Science and Engineering at NYU Tandon.
President Trump’s reelection campaign responded to the opening of a formal impeachment inquiry in Congress by launching a massive Facebook ad blitz, spending as much as $1.4 million on thousands of ads designed to reach voters in every state. … In total, the Trump campaign and its backers spent between $346,700 and $1,430,182 on more than 2,000 ads for its Facebook page from Monday to midday Friday, according to data analyzed by Laura Edelson, a researcher at New York University’s Tandon School of Engineering.