The ground shifted under Washington's policy toward Taiwan on December 8, a shift no less seismic for being subtle and semantic. During a hearing of the Senate Foreign Relations Committee, Assistant Secretary of Defense for Indo-Pacific Security Affairs Ely Ratner asserted that Taiwan is “a critical node within the first island chain (in the Western Pacific), anchoring a network of U.S. allies and partners … that is critical to the region's security and critical to the defense of vital U.S. interests in the Indo-Pacific.”

https://nationalinterest.org/feature/has-washington%E2%80%99s-policy-toward-taiwan-crossed-rubicon-197877