So it did, and Trump said it would disappear in a cloud of fairy dust. When it didn't, he espoused quack stuff such as bleach, UV light, and hydroxy-quinone. Held maskless rallies.
You don't seem to understand Trump probably got a few hundred thousand Americans killed with his ideas.
Even today, red states are far more likely to have higher infection rates and death rates from COVID than blue ones. That's his anti-science legacy.