My view is that he has no natural talent for the job because he is a salesman, not a financier. While sales skills are good for any public official to have, his sales acumen relates to selling complex software to savvy executives and not selling policy to regular people.
To an executive he comes across as smart, aggressive and focused. To a regular person he comes across as a condescending, combative know-it-all.
My son-in-law deals with him on a pretty regular basis and thinks the sun rises and sets on the guy.