U.S. President Donald Trump's positive test for COVID-19 confirmed what most voters already knew: This is the "Coronavirus Election."

During the closing stretch of the presidential race, Trump had worked furiously to shift public attention away from the virus and his handling of the pandemic, urging more states to open up fully and claiming the worst was over.

But the disclosure of Trump's illness on Friday shredded those arguments, returning the virus to center stage with just a month to go until the Nov. 3 election, and reminding voters yet again of the biggest public health crisis in a century that has killed more than 200,000 of their fellow Americans.