The departure of Ambassador Nikki Haley, a strong force for U.S. policies at the UN, illustrates a looming question: as the U.S. withdraws from the multilateral system it built, who will fill the void? China may be next.

Recently, the leaders of the world descended upon New York City for the opening of the 72nd United Nations General Assembly. However, despite Trump’s debut speech generating great interest and concern amongst the world and it’s leaders, several notable leaders were absent, namely China’s President Xi Jinping.

In his recent speech at the UN, President Donald Trump hinted at the future direction of US strategy. Here are the key takeaways.

It is inaccurate to accuse Trump of breaking with decades of U.S. deterrence policy for his threat to totally destroy North Korea. He may have been more blunt than any of his predecessors since Eisenhower left office, but his warning of total destruction was merely an updated version of Ike’s massive retaliation doctrine—this time applied to North Korea instead of the Soviet Union.

China believes that the Venezuelan government and people can resolve their problems within a legal framework and maintain national stability, Chinese Foreign Minister Wang Yi told his Venezuelan counterpart at the United Nations.

The U.N. demands the isolated country halts its weapons program but holding back on any threat of new sanctions.

Recent speeches given to the UN General Assembly by the U.S. and China illustrate sharp differences in areas such as domestic political systems, appropriate roles and relationships in world politics, and dispute resolution. Russia backed China on many points that the U.S. opposes. These disagreements will continue to play a large role in shaping the international arena.

President Barack Obama makes his final appearance at the United Nations General Assembly this week, with the world looking far different from the one he envisioned taking shape under his leadership when he first addressed the annual gathering eight years ago.