The content originally appeared on: CNN Washington (CNN)Biden administration officials are concerned that China could seek to declare a no-fly zone over Taiwan ahead of a possible visit by House Speaker Nancy Pelosi as an effort to upend the trip, potentially raising tensions even further in the region, a US official told CNN. China could also respond by flying fighter jets further into Taiwan's self-declared air defense zone, which could trigger a response from Taiwan and the US, the official […]