TOKYO -- Xi Jinping is now Kim Jong Un's most powerful bargaining chip as the North Korean leader points toward his meeting with U.S. President Donald Trump.
After months of displaying hostility toward the Chinese leader, including repeated nuclear and ballistic missile tests coinciding with key Chinese events, Kim, who serves as chairman of the Workers' Party of Korea, slipped into and out of China unannounced, adding one more twist in a series of dramatic diplomatic turns concerning the Korean Peninsula.
