Nowhere in his career did Donald Trump ever study the American government enterprise. He didn't study law either. Aside from gaining academic understanding, in the course of his family-owned dictatorial corporate enterprise, he did everything possible to skirt the laws and regulations governing his type of business.
His records show many violations of the law and his abuses of legal privileges that permitted him to duck obligations while harming people.
In my book, How to Select an American President by James A. George with James A. Rodger (c) 2017 Archway Publishing, the warning signs could be read from evaluating his resume. To be certain, many facts about Trump are hidden or buried by him. He was not cooperative or transparent. That is how he conned many of his followers.
Where Barack Obama compensated for the lack of experience with scholarly training in the law and intellectual brute force, Donald Trump is a brute who is ill-equipped for the job of President. Most significant, he lacks respect for the institution of government and the American political system that belongs to We the People.
Read a multipart series and analysis about Trump in the LA Times at this link: http://www.latimes.com/projects/la-ed-trumps-authoritarian-vision/
America's greatest mistake.