I had heard that after Reagan was elected, but before he was inaugurated, his people got in touch with American businessmen who did business in the Soviet Union. They were instructed to tell their high level Soviet counterparts to tell them that Reagan was unpredictable and could be set off with with wrong provocation. Keeping your adversaries guessing keeps them guessing and less dishonest.
Finally, Trump’s most noticeable characteristic is based on his ability to adapt swiftly to changing circumstances and to alter his behavior in the moment in order to operate effectively in the most unstable situations.
It’s clear that what some pundits consider Trump’s weaknesses are actually evidence of his deeply ingrained principles: love of country, a desire to impact others in a positive way, a realistic grasp on how the world really works, and a strong mission to get things done.