How will the voters react to the presidents diagnosis? And his behavior during the pandemic? Axios calls it the storyline of a Republican nightmare: 

A mask-disdaining President Trump gets the coronavirus on the eve of the election, against a political backdrop that looks dire for Republicans.

Some top GOP operatives, privy to data from swing states, tell me that this week’s chaotic presidential debate had a calamitous effect on Republican chances in tight Senate races. “The bottom is falling out everywhere,” said a longtime Republican insider.

This insider said the debate didn’t faze hardcore Trumpers. But he said it turned off “open to Trump” swing voters, especially women in suburbs.” Everyone knew Trump was capable of this kind of behavior,” the insider said. “But these voters had never had 90 straight minutes of that behavior thrust in their faces.” 

As of today, 34 states have started mail-in or absentee balloting while another 19 states are already voting in person. From The Week:

After Trump announced that he and first lady Melania Trump had both tested positive for COVID-19, The New York Times reported that “strategists in both parties and even senior aides to Mr. Trump said the president would face a harsh judgment from voters for throwing the country into greater uncertainty after one of the most trying years in American history.”

The Times goes on to report that advisers to Trump acknowledge that his positive diagnosis will “remind voters of how dismissive” he has been about the coronavirus. “Mr. Trump’s recklessness, one adviser admitted, amounted to a political ‘disaster,'” the Times writes.