Bare knuckle politics aside, I worked for the VA for 30 years, in Health Care Management and Public Affairs. I was these when Post Traumatic Stress Disorder was developed to describe what had been called "Battle Fatigue" and similar labels. Therapists were able to help Veterans who were experiencing depression, nightmares and anxiety after the trauma of warfare was no longer a part of their lives.
Mr. Trump came within inches of being killed this week. Complicating the event was the fact that he is a major public figure and will likely be exposed to reports of the gunshot again and again reminding him of the trauma he experienced. Given the nature of his Ultra-Type-A public personae he is more than likely to deny that it is affecting him, because he might be seen as being "weak." I presume his health care providers have assessed him and counseled him about what to expect. He is about to enter into a hectic three month long political campaign. Excess stress is inevitable. Denial is the enemy.
Make no mistake, I will not vote for Mr. Trump. But he has about a 50% chance of being our President. I would not feel safe if someone who is at high risk for a treatable disorder, but is in denial, is in charge.