SEOUL—Ban Ki-moon, the former United Nations chief, returned on Thursday to his native South Korea, landing in the middle of an increasingly heated battle to succeed the nation’s recently impeached president. After leading the polls for months, Mr. Ban’s support has eroded due to perceptions his policies would be aligned with President Park Geun-hye’s graft-tainted administration. “I have already said that I’m willing to give...

Source: Wall Street Journal January 12, 2017 07:11 UTC