(Erin Schaff | The New York Times) President Donald Trump on Wednesday night, Sept. 30, 2020, at a reelection campaign rally in Duluth, Minn. Trump revealed early Friday morning, Oct. 2, 2020, that he and the first lady, Melania Trump, had tested positive for the coronavirus, throwing the nation’s leadership into uncertainty and escalating the crisis posed by a pandemic that has already killed more than 207,000 Americans and devastated the economy.