The indictment of Roger Stone, who was arrested Friday by the FBI and charged with lying to Congress, provides the first detailed evidence that Stone was a go-between for Donald Trump's presidential campaign with WikiLeaks and its founder, Julian Assange. In 2016, WikiLeaks had and released a large numbers of emails that had been stolen by Russian intelligence from the Democratic National Committee and from Hillary Clinton's campaign.
Stone's coordination between the campaign and WikiLeaks is substantive, from what the court filings show. Stone, a Republican political operative and confidant of Trump, got advance notice of WikiLeaks document releases that he passed on to the Trump campaign.