Lee Jae-myung, a liberal who wants greater economic parity in South Korea and warmer ties with North Korea, became the main opposition party's presidential candidate Sunday, solidifying his position as front-runner to succeed recently ousted conservative President Yoon Suk Yeol.

During Yoon's six hours of martial law on December 3, Lee climbed the National Assembly's walls to avoid security cordons deployed on Yoon's orders. He livestreamed his exploit, urging viewers to come to parliament and demonstrate to prevent the arrest of lawmakers.

South Korea's Democratic Party presidential candidate Lee Jae-myung pledged in a Facebook post on Monday to bring in a production tax credit of up to 10% for semiconductors manufactured and sold domestically,