South Korea's main opposition Democratic Party leader Lee Jae-myung speaks at a supporters' rally on the final day of the general election campaign. The country will vote on Wednesday in key legislative elections that will determine control of parliament -- and whether President Yoon Suk Yeol can advance his socially conservative agenda. The April 10 election, in which voters will choose members of the 300-seat National Assembly, is widely seen as a referendum on Yoon, who won a 2022 election by the narrowest margin in South Korean history. IMAGES AND SOUNDBITES