South Korea’s liberal opposition has won a landslide victory over the ruling party of conservative President Yoon Suk Yeol in the country’s parliamentary elections. The opposition’s success means a considerable weakening of the head of state in domestic politics. After almost all votes were counted on Thursday, the Democratic Party (DP) of opposition leader Lee Jae Myung was able to strengthen its position as the largest single party in the 300-seat National Assembly. The DP, together with its smaller sister party the Democratic Alliance of Korea, will hold 175 seats, giving it an absolute maj…