During the 2016 election, Candidate Donald Trump shook the foundations of U.S.- Japan relations by suggesting Japan could acquire nuclear weapons. Trump critiqued the alliance for lacking in reciprocity, and suggested this was no longer in U.S. interests. In a rapidly changing Asia, the United States and Japan will need to adapt to a nuclear-capable North Korea and an increasingly assertive China. Can President Trump manage U.S. alliances in Asia? How can Prime Minister Shinzo Abe address U.S. concerns about burden sharing in the alliance? What are the challenges ahead for Washington and Tokyo, and will the alliance survive?