Elon Musk’s growing to-do list includes working with Boeing to speed up the delivery of Trump’s new Air Force One jetsSasha Rogelberg

Biographer Walter Isaacson and others close to Musk have previously described Musk’s periods of extreme productivity—and extreme temper—as “demon mode.” Read More Biographer Walter Isaacson and others close to Musk have previously described Musk’s periods of extreme productivity—and extreme temper—as “demon mode.”