Yale psychiatrist explains how Trump’s psychosis has spread to his rank-and-file supporters — and much of the GOP

First, allow me to remark on methodology. Ordinarily, I state that analyzing a public figure is complex, and have previously declined to comment on Kim Jong-un or Vladimir Putin. In order to offer a responsible analysis that is medically sound, an abundance of high-quality information is necessary.
Rarely do we have the amount that Donald Trump offers, with decades of candid interviews and clips; numerous collateral reports by close associates, many under sworn testimony; and direct, unfiltered, near-hourly reporting of thoughts (a full diagnosis needs more, although a personal examination is not the deciding issue, as it can in some cases be harmful in assessing personalities that deceive or charm).