fter barely six months in office, President Donald Trump has gone from peacemaker to warmonger. He attacked Iran and is threatening more strikes, bombarded Yemen’s Ansar Allah militants on behalf of Israel and Europe, is encouraging the former to conquer Gaza, and is increasing U.S. involvement in the Russia-Ukraine cataclysm.War with Russia is the most immediate danger. Its invasion of its neighbor was a tragedy, but requires U.S. avoidance, not involvement. Throughout most of America’s history, Ukraine has been ruled from Moscow. The Ukrainian people have long suffered under that relationship, but Washington never considered going to war on Kiev’s...