You’re not familiar with the method of “buying” admission to prestigious schools, I gather?
Plenty of absolute imbeciles have been admitted to, and graduated from, Wharton and many other top universities around the world. Wharton is actually known in America for being a school especially accessible for “legacy” and/or “contribution” admission, neither placing special importance on the preparedness, intelligence, or even interest of the student, but focusing almost entirely on the connection of the parents to the school or the wealth they are willing to share with the school in exchange for admission of their progeny.
The fact that many of his former professors and classmates are on record saying he was one of the dumbest people they had ever encountered, the fact that he has invested quite a lot of time and money in blocking release of his secondary and higher education transcripts (whilst most other high level politicians make it part of their election campaign strategy to release theirs), and the fact that he sounds like a pisses 10 year-old when he attempts to discuss anything involving more nuance than can be found on a fortune cookie, should tell you what you need to know about his intelligence.
But I am fairly sure you aren’t discussing this in good faith, so overwhelming evidence contrary to your position is not meaningful to you.