South Korea's main opposition is expected to pick a high-profile rival of the president as its new leader, adding to the government's challenges as it struggles to build support after three months in office.

Axar.az reports the progressive Democratic Party is set to elect Mr Lee Jae-myung on Sunday (Aug 28) to take over as boss and lead the charge against conservative President Yoon Suk-yeol.

Mr Lee, a populist pushed to introduce universal basic income, narrowly lost to Mr Yoon in the presidential election in March in a bitterly contested presidential election where the candidates berated each other on the campaign trail.