William Matthews is a senior research fellow for China and the world at Chatham House.
Trump's economic demands put Washington's position at risk in the Indo-Pacific

A High Mobility Artillery Rocket System on display in Taichung, Taiwan: The U.S. is still crucial to the security of its allies in Asia but is no longer strong enough to win a war on its own. © Reuters
William Matthews is a senior research fellow for China and the world at Chatham House.