At a moment when an active regional conflict already strains the architecture of international order, Donald Trump has brought the question of Iran's nuclear ambitions before the United Nations General Assembly — seeking to transform skepticism into solidarity. The nuclear question is not new, but the context is: world leaders who have watched American commitments shift and dissolve now sit in judgment of a case that must be built, not assumed. Whether one man's argument can move a fractured international community toward coherent action is itself a measure of how much that community still hol