Biden vows to intervene militarily if China invades Taiwan

President Biden's statement that the U.S. would defend Taiwan from an attack from China triggered a sharp response from Beijing. It also raises questions about whether this is changing U.S. policy and making a new commitment to Taiwan. Ivan Kanapathy, director for China, Taiwan and Mongolia on the National Security Council staff during the Trump administration, joins Nick Schifrin to discuss. PBS NewsHour is supported by - https://www.pbs.org/newshour/about/funders