A revelation buried in a cache of documents opens a new and potentially important investigative corridor for Special Counsel John Durham. The shady tech executive who featured prominently in the federal indictment of Hillary Clinton campaign lawyer Michael Sussmann was also communicating with a covert group of computer scientists skilled in mining internet data. This revelation raises concerns that the man referred to in special counsel documents as Tech Executive-1, Rodney Joffe, may have shared sensitive government and private internet data more broadly than previously thought. Joffe’s role in Spygate represents one of the most recent developments exposed by the...