Donald Trump warned us.
During the 2016 presidential campaign, then-candidate Trump advertised that he would be unpredictable, and, in fact, saw unpredictability as a strategic asset. In his campaign-season book “Crippled America,” he wrote: “I don’t want people to know exactly what I’m doing—or thinking. I like being unpredictable. It keeps them off balance.” He said a business associate described unpredictability as “one of my better qualities.”
Source : https://www.wsj.com/articles/where-donald-trumps-unpredictability-could-hurt-him-1508772460