With North Korea’s latest test of an intercontinental ballistic missile, one apparently capable of reaching California, the American foreign policy community is struggling to find a way — short of war — to end the threat from Pyongyang. In the media and behind closed doors, some are suggesting that the U.S. should approach China for a grand bargain. The idea is deceptively simple: China would intervene in North Korea, most likely by removing Kim Jong Un from power and installing a puppet in his place. In return, the U.S. would withdraw or significantly reduce our forces in South Korea and potentially forces farther afield in Asia.