For real, does this guy even know he's the President of the United States; not the United Nations, or the United Arab Emirates or any other United entity. He doesn't really have the authority to declare capitals, nor the brain capacity to understand the ramifications here.
https://www.wsj.com/articles/trump-says-u-s-recognizes-jerusalem-as-israels-capital-1512584043?tesla=yAnd of course, his escalation of the conflict with North Korea that the Joint Chiefs believe could lead to 300,000 deaths in the first few days:
http://www.cnn.com/2017/11/30/opinions/millions-could-die-in-a-war-with-north-korea-opinion-gallego-lieu/?iid=ob_mobile_article_footer_expansion