Biden says U.S. has "commitment" to defend Taiwan if China attacks

President Joe Biden said on Thursday that the United States would defend Taiwan if   China   ever attacked the democratically governed island. The White House quickly walked back his remark as analysts tried to discern whether Mr. Biden might have been signalling a change in Washington's long-held policy of "strategic ambiguity" over the role the U.S. would play in the event of a military conflict between   China and Taiwan .  "Yes, we have a commitment," the president declared after being asked during a  CNN Town Hall  in Baltimore, Maryland whether the U.S. would defend Taiwan in the face of an attack by China.  China's hypersonic missile test an "important surprise" "China, Russia and the rest of the world know we have the most powerful military in the history of the world," Mr. Biden said. "Don't worry about whether they [China] are going to be more powerful. What you do have to worry about is whether or not they're going