worth posting again:

"Trump has not been cunning but credulous; not an authoritarian but a pushover.
Ultimately, Trump is failing because he has little knowledge of the world and no guiding star of moral principle. The best of our leaders — think Abraham Lincoln — have been sure about the truth and uncertain about themselves. Trump is the opposite. His mind is uncluttered by creeds. He knows what he wants at any given moment, but it can bear little relation to the moment following. Who really believes that he would be sleepless if the wall were not built or if NAFTA ultimately survived? Who believes he would not be sleepless because of a nasty joke at his expense during a dinner party?
Without deep and thoughtful beliefs, persuasion is impossible. It is public reasoning that allows others to follow a leader’s footsteps in the snow. What has Trump done to rationally and respectfully persuade his critics?
During his campaign, Trump looked down on the weak; now it is revealed HE, is weak." 
*Michael Gerson, WP