I think Trump's real weakness - and one that we're all reeling from now - is that he thrives in one-to-one conflict but has no idea how to manage multiple conflicts, and he also doesn't know how to approach a problem unless he can reframe it for himself as a conflict. Bear in mind, this is a guy who asked why we couldn't just blow up a nuke to stop a hurricane. This shows his other weaknesses as being ignorant as fuck about anything outside of his immediate predator worldview, and of course immune to learning.