Much of the post-election discussion has focused on what the next administration will do, its policies and its personnel. There is, however, a bigger, looming question: How will President-elect Donald Trump temperamentally and intellectually handle the burdens of the presidency?

Trump’s temperament and character were central to the concerns of millions of voters, including Republicans who would not support him. His lack of empathy, intellectual lethargy (he brags he rarely reads a book all the way through), his hunger for approval, his lack of impulse control, his explosive temper and his vindictiveness were evident throughout an 18-month campaign. They remain a threat to his presidency and to the country.