Biden on Taiwan

Biden was absolutely right to make clear to China that if it invaded Taiwan, the U.S. would come to the defense of Taiwan.  China, of course, says Taiwan is an integral part of China, and an invasion would be legally justified.  The people of Taiwan obviously disagree. 

In 1950 it was unclear if the U.S. would come to the aid of South Korea if South Korea were attacked.  An actual map of areas that the U.S. would defend was released, and South Korea was conspicuously left outside the line.  North Korea may have been encouraged by that omission.  Sometimes ambiguity in foreign policy is not a good thing.