South Korea’s ruling liberal party secured a resounding victory in parliamentary elections, which had the highest turnout in nearly three decades despite the coronavirus sickening thousands and forcing social distancing at polling places. The ruling Democratic Party and a satellite party it created to win proportional representative seats combined to win 180 seats in the 300-seat National Assembly, election officials said with vote-counting nearly complete Thursday. Meanwhile, conservatives suffered their worst showing in the densely populated Seoul metropolitan area in years. The comfortable majority is expected to embolden President Moon Jae-in’s government to pursue its key domestic and foreign objectives, such as reviving diplomacy with nuclear-armed rival North Korea, while it grapples with a historic public health crisis that is shuttering businesses and threatening livelihoods. “We feel heavy responsibility, which outweighs our joy of winning the election,” Democratic Party leader Lee Hae-chan said in a party meeting. “We will make preemptive and aggressive efforts to overcome the novel coronavirus crisis and the threat it poses to livelihoods and the national economy.” Hwang Kyo-ahn, leader of the conservative United Future Party, who lost to a Democratic Party candidate in a key Seoul district, apologised to his supporters for “failing to prevent the country from going in a wrong direction at an important time”. More than 17 million South Koreans voted on Wednesday. When combined with the 11.8 million early and mailed-in votes, turnout was 66.2 per cent, the highest since 71.9 per cent turnout in a 1992 general election, the National Election Commission said. Analysts struggled to explain the surprisingly high turnout. Some said fear and alertness over the pandemic may have driven voters to support Mr Moon’s government so it could fight the virus and its impact with more political stability. Before the virus outbreak, Mr Moon's support was faltering over a decaying job market, corruption scandals surrounding key political allies and troubled ties with rival North Korea. But surveys before the polls indicated growing support, reflecting public approval of an aggressive test-and-quarantine programme credited with lowering fatality rates for Covid-19 compared to China and some places in Europe and North America. As of Thursday, South Korea had more than 10,600 people infected with 229 confirmed deaths. It drew contrasts with upended election cycles in the United States and Europe and possibly set an example for how democratic elections can be handled during a pandemic. South Korean election and health officials had prepared safeguards to reduce the risk of the virus being spread. Masks were worn by voters and poll workers. A metre of social distancing space was marked from nearby streets all the way to the voting booths. Voters who passed a temperature screening were given sanitising gel and disposable plastic gloves before entering booths. Anyone with a fever was taken to a separate area to vote. People formally quarantined in their homes were escorted or monitored through tracking apps while they cast their ballots later than other voters. Those hospitalised or in isolation or quarantine could vote by mail or at temporary shelters during early voting last week.