Private philanthropy stepped into the breach. An assortment of foundations contributed tens of millions in election-administration funding. The Chan Zuckerberg Initiative chipped in $300 million. “It was a failure at the federal level that 2,500 local election officials were forced to apply for philanthropic grants to fill their needs,” says Amber McReynolds, a former Denver election official who heads the nonpartisan National Vote at Home Institute.

Quinn’s research gave ammunition to advocates pushing social media platforms to take a harder line. In November 2019, Mark Zuckerberg invited nine civil rights leaders to dinner at his home, where they warned him about the danger of the election-related falsehoods that were already spreading unchecked. “It took pushing, urging, conversations, brainstorming, all of that to get to a place where we ended up with more rigorous rules and enforcement,” says Vanita Gupta, president and CEO of the Leadership Conference on Civil and Human Rights, who attended the dinner and also met with Twitter CEO Jack Dorsey and others. (Gupta has been nominated for Associate Attorney General by President Biden.) “It was a struggle, but we got to the point where they understood the problem. Was it enough? Probably not. Was it later than we wanted? Yes. But it was really important, given the level of official disinformation, that they had those rules in place and were tagging things and taking them down.”