Since inauguration day, the Trump White House has routinely evoked a deep-rooted Cold War framework for expressing America’s relationship with war. This framing sits at odds with the president’s inaugural address in which Mr. Trump, conjuring Richard Nixon, argued that his “proudest legacy will be that of a peacemaker and unifier.” From January 2025 on, the administration has instead engaged in a steady drumbeat of aggressive militaristic taunting, threatening real and perceived enemi...