Answer: Trump is weak in the following areas:
1. Intelligence (as in academic knowledge)
2. Intelligence (as in understanding the concept that the U.S. intelligence agencies/services have more informant than he has and understand international strategic issues better than he does).
3. Diplomacy. Trump clearly doesn't understand international diplomacy.
4. Support of the USA's allies
5. Law. Trump has demonstrated that he has little or no understanding of legal issues at the administrative, civil and criminal levels.
6. Support of his own federal law enforcement agencies. Trump contradicts and undermines his own people and the agencies they represent on a regular basis.
7. Military (aside from being a coward and a draft dodger) Trump somehow thinks he knows more about military service and operations (strategy & tactics) than career military officers.
8. The economy. So far Trump has been riding on the back of the good economy which was handed to him. However, his spending and tariffs put that at risk over the long term. He is not "conservative" but rather is reckless.
9. People. Trump does not know "good" people and has demonstrated that time after time. Aside from that, Trump seems to relish insulting just about anyone.
10. Unifying the country. Trump gives lip service to unifying the country, but hasn't done anything to really to it.
11. Maturity. Almost daily Trump demonstrates a lack of maturity in his tweets and his bizarre ranging on FoxNews.
12. Responsibility. Trump blames other people for anything and everything.
13. Public speaking. While his followers seem to like his rallies, if you actually look and listen to what he says, his command of the English language is poor at best.
14. History. Trump has repeatedly demonstrated that he does not know and understand U.S. history.
15. Honesty. Trump has demonstrated throughout his adult life that he is not an honest person. He tells lies frequently.
16.... Shall I go on?