President Trump briefly stopped by a daylong summit of world leaders meeting to discuss climate change at the United Nations General Assembly (UNGA) in New York before leaving to address a meeting on the persecution of religious minorities and his administration's efforts to support religious freedom. Earlier Monday morning, White House press secretary Stephanie Grisham raised the possibility that Mr. Trump might find time to appear at the climate change summit. "His schedule is ever changing, but it wouldn't surprise me if he popped by," she said in an appearance on Fox News. And Mr. Trump did end up dropping...