The news broke late at night, and by Friday morning a nation confronting a pandemic, economic crisis, racial divisions and plummeting stature in the world awoke to another trauma: president Donald Trump, who had long scoffed at a disease that has killed more than 208,000 Americans, had contracted Covid-19.It was startling. But it fit the surreal narrative of this conflicted country. Some wept; others gloated. A helicopter lifted the president from the White House to a hospital. Another blow –…