The secretary-general, who is also visiting Washington this week for consultations on Capitol Hill, tried out this line for the first time in late May. Speaking on the eve of President Trump’s decision to withdraw from the Paris climate change agreement, he warned that if the U.S. created a “geostrategic vacuum” by giving up its global role, “I guarantee that someone else will occupy it.” He clearly implied this would be Beijing.

Guterres, who was once a professional physicist, summoned up the vacuum metaphor in a mid-year press conference last week, but with more of a pro-American twist. “I don’t think this is good for the United States,” he said of other powers’ potential power grab, “and I don’t think this is good for the world.”
Many pundits have highlighted how China is benefiting from Trump’s foreign policy mess in far starker terms. But it is striking that a U.N. secretary-general is talking even this frankly about geostrategic power shifts. Whatever the U.N.’s conservative foes say about the organization, international officials hate criticizing America in public. The U.S. remains the organization’s predominant funder. Washington has been brutal with previous secretaries-general who have criticized its policies, as Kofi Annan did over Iraq.