I really think South Korean President Moon Jae-in wants to bail Kim Jong-un out more than I want my next breath. Even before he was sworn in, he called for the reopening of Kaesong and other joint projects to ease the burden of U.S.-led sanctions. Once in office, he called for major investments in North Korea until a call from the Treasury Department scared his bankers away. He turned a blind eye to purchases of North Korean coal, and probably to the smuggling of luxury goods, into...