Hunter refers to “my guys upcoming travels” in his email to business partner Devon Archer dated April 13, 2014, one week before Joe visited Ukraine as vice president. It was an uncharacteristically sophisticated email, listing 22 points about Ukraine’s political situation, with detailed analysis of the upcoming election and anticipating an escalation of Russia’s “destabilization campaign.” Unlike anything else written by Hunter in thousands of documents during the nine years covered in the laptop, the email has the distinct flavor of an official briefing, or perhaps even a classified one. An artificial-intelligence analysis of the email shows a stark difference...