The possibility of U.S. House Speaker Nancy Pelosi visiting Taiwan is stoking China-US tensions just days ahead of a phone call between President Joe Biden and President Xi Jinping. Stephen Engle reports on Bloomberg Television. -------- Follow Bloomberg for business news & analysis, up-to-the-minute market data, features, profiles and more: http://www.bloomberg.com Connect with us on... Twitter: https://twitter.com/business Facebook: https://www.facebook.com/bloombergbusiness Instagram: https://www.instagram.com/bloombergbusiness/