To shut up the leftists who were calling for his head. They can't say he didn't do anything. Then he releases the vaccine and they said, "Orange Man Bad!!! I won't take your vaccine!!!"

All of that just to expose their hypocrisy.

Not only that, but someone else mentioned here that Trump was throwing a wrench into the DS/NWO's plans for a decade long, or longer, of lockdowns and masks but with the advent of the vaccine, he's forcing them to speed up the process, hence "Warp Speed".