In a city that has long served as a stage for the collision of American ambitions, President Trump and New York Mayor Zohran Mamdani set aside months of mutual contempt to meet in Manhattan and discuss the unglamorous work of governance — housing, immigration, and the needs of millions. The encounter, their third since Mamdani's election, revealed something older than ideology: the persistent human tendency to negotiate across difference when the stakes are concrete enough. Where insults once defined their relationship, a $21 billion housing proposal and the welfare of New Yorkers now provide