China warns of retaliation over Taiwan President's US visit

China has threatened retaliation if US House Speaker Kevin McCarthy meets with Taiwanese President Tsai Ing-wen during her transit through the US next week, calling it a "provocation." Tsai's trip comes amid growing tensions between the US and China, and underscores Taiwan's increasingly fragile status. While visits by high-level Taiwanese officials are routine, Beijing views them as an expression of support for Taiwan's independence. The US says Tsai's travel should not be used by China "as a pretext to step up any aggressive activity around the Taiwan Strait."