Trump’s mindset became increasingly surreal. He began to tout hydroxychloroquine as a cure for Covid-19. On March 19, at a regular televised briefing, which he conducted daily for five weeks, often rambling for more than two hours, he depicted the antimalarial drug as a potential magic bullet. It could be “one of the biggest game-changers in the history of medicine”, he later tweeted.

The president’s leap of faith, which was inspired by Fox News anchors, notably Laura Ingraham, and his lawyer Rudy Giuliani, none of whom have a medical background, turned Washington’s bureaucracy upside down. Scientists who demurred were punished. In April, Rick Bright, the federal scientist in charge of developing a vaccine – arguably the most urgent role in government – was removed after blocking efforts to promote hydroxychloroquine.

Most clinical trials have shown the drug has no positive impact on Covid-19 patients and can harm people with heart problems. “I was pressured to let politics and cronyism drive decisions over the opinions of the best scientists we have in government,” Bright said in a statement.