A significant portion of online support for Hillary Clinton is manufactured by paid “astroturf” trolls: a large team of supporters who spend long hours responding to negative news on the internet about her.

The Clinton SuperPAC Correct the Record, which is affiliated with her campaign, acknowledged in an April press release that it was spending $1 million on project “Breaking Barriers” to pay people to respond to negative information about Clinton on social media sites like Facebook, Reddit, Instagram and Twitter.

That amount has since increased to over $6 million.

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