Does Trump make the vaccine ????
No - companies that specialize in this do, and they are not taking on the kind of liability they would face if they hadn't taken it through enough tests to be relatively (very high on that relative scale) sure. Besides, their will not be just the US government looking over this(these) vaccines.
Nothing is 100% sure, that is obvious with the passing of time, as things thought to be safe, looking back many years later .... But for high risk people, the risk of being an early adopter is a probably a lot less than the virus itself. And they are the first ones who need it anyway. For some teenager with about zero chance of dying ... its like catching anything else that could happen to them.