A person enters the election campaign office for Lee Jae-myung, former leader of the liberal Democratic Party and a leading candidate for the June 3, 2025, presidential election, in Seoul on April 13.

South Korean opposition leader Lee Jae-myung, who is the front-runner in opinion polls to be the country's next leader, declared his bid for the presidency on Thursday, promising to focus on fixing inequality and economic growth.

South Korea's main opposition party head Lee Jae-myung said on Wednesday he was stepping down as party leader amid expectations that the current populist front-runner for the presidency in public opinion polls would soon declare his run.