A US government-funded nonprofit known as “the mountain retreat for the liberal elite” sponsored a “tabletop exercise” intended to influence coverage of a leak of documents related to Hunter Biden, the latest installment of Elon Musk’s “Twitter Files” reveals. In a series of tweets Monday, independent journalist Michael Shellenberger posted confidential documents from the Aspen Institute’s September 2020 event, which he said was attended by Twitter’s then-head of trust and safety, Facebook’s head of security policy and top national security reporters from The New York Times and The Washington Post. The exercise by the “Aspen Digital Hack-and-Dump Working Group” involved...