A Facebook executive in 2016 warned the company that taking down all instances of political misinformation would unfairly target conservative users of the social network, The Washington Post reported on Thursday.

The reported warning came in the weeks following the 2016 presidential election, when Facebook was in the early stages of developing "Project P" — for propaganda — in an effort to streamline how misinformation about American elections and politics was identified and removed from the site.

The program quickly found dozens of pages that had put out false information about the election and its candidates in the weeks leading up to the election. It was also discovered that the majority of the pages were based overseas, had financial motives and exhibited significant conservative bias, the Post reported.

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When higher-ups in the company moved to have all of the pages removed, Joel Kaplan, now head of Facebook’s Washington office and the highest-ranking Republican at the company, reportedly pushed back.