I first learned about the very existence of Mango Mussolini when he decided to run for the office of POTUS at the end of Obama’s second term. Until that time, I had no idea who he was or that he existed at all. Although I had read Terry Pratchett’s Going Postal several times at that time. It took a while, but I did eventually realize that Reacher Gilt is his parody, albeit with one difference – Reacher is intelligent and well informed, albeit ruthless and manipulative.
Trump has none of Reacher’s good qualities, only the bad ones.
I listened to some of his speeches at the beginning of his political career, and frankly, I was appalled at their quality, or more precisely, their lack thereof. From the very beginning, he demonstrated profound ignorance about history, current politics, law, economics, and indeed about how the world works in general. I became very quickly convinced that he is an idiot, and the only reason why he is neither in jail nor without a penny to his name is that he was born to riches and that has always shielded him from the most egregious negative consequences of his actions.
But although I was unimpressed with the content of his speeches from the very start, he was at least speaking coherently and staying on topic back then. It went downhill from that time on; his speeches deteriorated both in quality with regard to content, as well as regarding the execution. Nowadays, he trips over words, is unable to follow a coherent thought to the end, and rehashes old grievances all the time, all signs of dementia.
So IMO, he was always a fool, and now he is a demented fool. Yet he won the presidency twice, and just barely lost once. And to this day, many people keep saying that this is proof that he is neither demented nor a fool, but actually intelligent and a masterful manipulator. I disagree for several reasons.
Mainly, he did not actually have to manipulate the American public to vote for him. A sizable portion of said public was always racist, bigoted, ignorant, and resentful, and these “qualities” were nurtured and elevated as virtues by the USA right-wing pseudonews apparatus for decades prior to his entering the political arena. A self-feeding loop was thus created just prior to 9/11, and it has fed on itself ever since, culminating in the rise of the Tangerine Tyrant. He was at the exact cross of a crass, boorish, racist, ignorant, and resentful asshole and a dude whose riches served as an easy-to-understand shorthand for competence for the voter base to look up to. Because actual competence requires effort to recognize.
He was just lucky to be the exact guy that the already pre-manipulated masses of hateful peabrained bigots wanted. He did not win their vote because he was intelligent; he won it because he fit the mold of hate that was formed in their minds through decades of propaganda.
That he became president is not proof of his intelligence, knowledge, or competence. It is proof of a profound lack of all those qualities in the American public.

Recall also the context of the US public’s decades of “non-political” brainwashing by decades of television programming with the “meta” message that what they see on their screens matters more than what they experience in their lives, and the specific lie from “The Apprentice” that Trump-the-businessman always held control and never made mistakes.
Insert screaming emoji here.
Well said!