Contact Tracing the President

How did he get the virus, and who else might he have infected? Let the detective work begin.

President Donald Trump speaks at a “Make America Great Again” campaign rally at Duluth International Airport in Duluth, Minnesota, on September 30. Credit: MANDEL NGAN / Getty Images

It was the tweet heard ‘round the world: President Donald Trump and first lady Melania Trump tested positive for Covid-19. Only a few hours later, there is rampant speculation about the timeline and source of the president’s infection. How did he contract the…