Welcome to The Adversarial. Every other week, we’ll provide you with expert analysis on America’s greatest challengers: China, Russia, Iran, North Korea, and jihadists. Read more below. *** Russia There is intense focus on whether the United States will allow Ukraine to strike deeper into Russian territory, in particular through the use of advanced weapon systems like the U.S. Army Tactical Missile Systems or European long-range missiles that contain U.S. content. President Vladimir Putin has said that the use of such systems would require direct Western involvement and therefore would equate to NATO entering the war. Ukraine and its backers