That Trump is a narcissistic personality disorder is a foregone conclusion. His thin-skinned “counter-puncher” routine is a direct result of his narcissism, which should be fairly clear to us. What may not be clear is his inability to reach out to voters outside of the committed few. He is invested in his demographic, white men, and he’s making little to no attempt to appeal to anyone else.
Trump loves the large cheering adoring crowds. Yesterday he changed a town hall-style meeting in Ohio into a large rally. If he were to have a smaller event or tried to appeal to non-white male voters, what might happen? He might be rejected. He might not have the adoring crowds. He might encounter real resistance at a small meeting with voters that he could not shame and eject. His ego can’t risk it.
Unless there is a major security event that scares people into voting for Trump before the election, he probably can’t poll much higher than 40%.