Sometimes, insecure people keep repeating things to you to remind themselves or try to convince themselves of something they don't fully believe.
For example, reserach how many times in a month he is making a speech and keeps reminding everyone he is POTUS. How many times does he say something along the lines of "... and I, as POTUS, will blah,blah,blah...."
All of the above and the fact that he falls so easily into a parent ego state when challenged (real or imagined) made me write him off in the first 7 minutes I ever heard him speak. His low self esteem screams for attention from the pages of his vulgar little books, IMHO.
Painfully easy to read.....