President Trump's summit with Xi Jinping was staged as a reunion between old friends, concluding Friday with a private tour of Zhongnanhai, the Chinese Communist Party's leadership compound. Strolling the gardens, Trump declared the blooms around him "the most beautiful roses anyone has ever seen." Xi promised to send him seeds. Why it matters: The warm public choreography of the past two days conceals a harsher reality: nearly every force shaping U.S.-China relations is pulling them apart. T