This explains a lot…

“Michael D'Antonio is the author of the new book "Never Enough: Donald Trump and the Pursuit of Success”.…..”When I asked Donald Trump in 2014 about his temperament, he readily volunteered this: 

"When I look at myself in the first grade and I look at myself now, I'm basically the same. The temperament is not that different."” - 
http://www.cnn.com/2016/03/04/opinions/president-trump-six-year-old-with-nuclear-weapons-dantonio/