American truckers don’t like taking orders. But the Biden administration has increased pressure on them to take the vaccine—willing or unwilling. All through the pandemic, truckers endured hardships to keep America’s infrastructure running. They waited in line for hours in sight of bathrooms they weren’t allowed to use. On the road, some died alone of COVID-19. Now, with supply chains disrupted, Americans need them more than ever. But faced with the prospect of a forced vaccination, many drivers are considering quitting. “I’d fight it,” said veteran trucker Mike Widdins, referring to vaccine mandates. “I think a lot of us will...