During the relatively kinder, gentler, and saner days of the Obama administration—way back in the early 20-teens—a misguided portion of the political commentariat subscribed to what was derisively termed the “Green Lantern Theory” of presidential power. In short, it posited that presidential accomplishment is simply a matter of willpower (a reference to the titular DC comic book superhero’s ability to manifest astonishing superpowers simply by channeling his resolve). That President Barack Obama