One of them had stopped unexpectedly as he and first lady Melania Trump were riding it toward the Assembly hall. The U.S. president’s “America First” credo has always been a tricky fit with the U.N.’s commitment to global-scale shared decision-making. The General Assembly ’s big week of meetings began Monday with events including a conference on the Israeli-Palestinian conflict. Gaza already has seized attention at the General Assembly. Almost all U.N. member nations have signed up to take their turn during the Assembly’s six-day-long speechfest.