Trump himself faces 18 charges related to the effort to overturn the election across two separate cases, one brought by a special counsel and the other by the Fulton County, Ga., district attorney. (Trump faces separate felony charges related to his allegedly mishandling classified documents and falsifying business records, and he’s also party to a civil fraud trial that could shut down his businesses.) Despite an 814-page report by the now-disbanded House Select January 6 Committee, and hundreds of criminal prosecutions and civil lawsuits, significant questions remain unanswered about how the attack on the Capitol was organized and the extent...