What would happen if the maniacal tyranny in Pyongyang took over the vibrant democracy of South Korea? Today, there is a real possibility that the destitute North Korean regime will soon dominate its thriving southern neighbor, with help from the government in Seoul itself. More than any South Korean president before him, Moon Jae-in is intent on achieving Korean union, even if it's done on Pyongyang's terms. To that end, he has been making...