President Lai Ching-te of Taiwan discusses China’s increasing military hostility toward the United States. Mr. Lai is facing pressure on many fronts, including increasing military hostility from China, fierce trade negotiations with the U.S. and tough resistance from the oppositional Nationalist Party.

A semiconductor powerhouse, Taiwan has sought to use its chip expertise as leverage in its trade negotiations. “President Trump wants the U.S. to become the world center for A.I., and we are willing to assist in this,” Mr. Lai said.

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