Aside from personal enemies Trump seems to have enemy groups.
The Media
Scientists
FBI
CIA
All Intelligence Services
Mueller probe.
In short, if you are in a job with a primary focus of trying to discover the truth, you have made the enemies list.
Not only does Trump seem to have a poor relationship with the truth, he does not like those who try to cultivate a good relationship .
(sigh)
The Media? Their role is to report what they consider to be "newsworthy" and profit thereby, not to "find the truth." We have example after example of segments "lying" (propagandizing?) as much if not more than the target of their constant efforts at "Fake news."
FBI? Their role is to investigate allegations of Federal crimes, but for decades the creator J. Edgar Hoover used the organization as his own blackmail squad. Then we have the various plots of Strzok, Page, Ohr, McCabe, Comey, et. al. to show how "truthful" some of the top leadership were not.
CIA? Their role is foreign intelligence gathering and counter-intelligence action. They've been involved in hit squads, foreign rendition, drug smuggling, and all sorts of dirty tricks both in and outside the USA and were not above dirty politicking against our own.
All Intelligence Services? You mean like the NSA and their internal spying actions revealed by Eric Snowden?
Mueller probe? This is a prosecutorial investigation, i.e. an effort to
find evidence of an alleged crime, NOT to find
the truth. It is not going to publish an unbiased report, but as Alan Dershowitz states it will be a hit piece designed to be as devastating as possible against Trump.
In short, if you have a job designed to "investigate" a "target," then you are not seeking the truth but rather preparing ammunition to take down that target.
(I left out "scientists" because I don't see any foundation for them being on your "list.")
See how easy it is to engage in hasty generalizations? :coffeepap: