Park Won-soon, candidate for the mayor of Seoul from main opposition party New Politics Alliance for Democracy, celebrates his victory at his campaign office in Seoul June 5, 2014. South Korean President Park Geun-hye's conservative party fought close races on Wednesday in regional and mayoral elections seen as a referendum on the government's handling of a ferry disaster that killed more than 300 people in April. REUTERS/Kim Hong-Ji (SOUTH KOREA - Tags: POLITICS ELECTIONS)