COVID-19 isn’t partisan. But it’s intensifying America’s red-blue divide.

Divided by geography and culture, and relying on different media sources that often emphasize different facts, Americans are experiencing the pandemic through sharply divergent partisan lenses.

Mask or no mask? Reopen businesses or keep them closed? Trust Dr. Anthony Fauci’s expertise – or not so much?

On question after question, the debates have grown heated. Even amid a pandemic, when a sense of common purpose and shared values are essential, the nation’s red-blue divide seems as sharp as ever. In some circles, wearing a mask is now seen...