Sim Sang-jung

Following the disintegration of the Unified Progressive Party after the Park Geun-hye government's petition to the Constitutional Court of Korea for the UPP's alleged pro-North Korean views in 2013, Sim help found and is the current leader of the Justice Party. Sim won another seat in the 20th National Assembly in 2016, again in an area of Goyang with 53% of the vote.

Sim was first elected as a proportional representative in the 17th National Assembly under the Democratic Labor Party. She won her first direct election in the 19th National Assembly as a member of the UPP with 49.37% of the votes in an area of Gyeonggi Goyang in 2012.

At the age of 21, she worked at a cassette tape factory where her days as a labor rights activist began. Sim was subsequently fired for mobilizing workers to demand higher wages and better meals. She "hopped from job to job" to earn a wage but continued her labor activism. In 1985, she was on the country's most wanted list for instigating labor strikes. She was on the list for 9 years, and married her husband, a fellow activist, during that time. She was formally charged for 'instigation of mass harm' and 'instigation of arson', and was sentenced to 1.5 years imprisonment, but a 2-year suspended sentence, soon after she became pregnant.

Sim Sang-jung (born 20 February 1959) is a South Korean politician. She was one of the five major presidential candidates in the 2017 South Korean presidential election, running as the Justice Party's nominee.