In short, it is my opinion that trying to understand the psychology of the Trump decision process is very incomplete. His decisions are made more by the sociology of his minions than by his own abilities, and they operate in order to cater to Trump's efforts to defend his weak ego.For a while, I've been playing with the idea of society as a superorganism, where individual humans are the cells and social structures are what hold the whole thing together and coordinate the parts.
This commenter brings in a related idea, where the individual almost doesn't exist but is instead some sort of locus of the interactions of the people in the environment.
Perhaps people fall along a spectrum. At one end are strong characters; as with any human, they are partly a product of their interactions with others, but there is a recognizable core and a discernible purpose that guides their will to shape events.
At the other end is Trump, who brings no core other than emotional need, and thus becomes a vessel for the interplay of other people's agendas. True, it's a vessel that warps those agendas as they approach, but it has no shape of its own, beyond desperation to hide from the reality of failure.