FWIW if I understand correctly what people say about Trump’s psychology, which if he is a malignant narcissist is a pretty complex maelstrom of instincts, he is actually at a disadvantage in imagining ever dying.

He will not be able to cope with the idea, or be able to rationally plan for it. Unlike other eighty year olds he is not thinking of a future without him in it; rather nobody else has any future without him.

So he is not acting nihilistically but desperately and grandiosely, as a way to deflect from the whole concept. I think there are many examples of this in recent months, but they are moderated by his inability to stay awake.