Former Democratic Party leader Jung Chung-rae officially announced his bid for re-election at the party's upcoming Aug. 17 convention [1].

The announcement signals a deepening conflict between the Democratic Party and the opposition People Power Party over the legal powers of the prosecution. The dispute centers on the abolition of the supplementary investigation authority, a move that could fundamentally alter how criminal cases are handled in South Korea.

Jung made the announcement at 2 p.m. [2] at the National Assembly in Seoul. He is one of five expected candidates in the leadership race [1]. With only four days remaining until the official candidate registration deadline [1], the contest is expected to intensify as the convention date approaches.

Parallel to his candidacy, Jung has focused on the prosecution's role in the legal system. In a Facebook post made Aug. 26, 2026, Jung urged for a speedy abolition of the supplementary investigation authority [5]. He characterized the effort as a "speed war" and said that legislation should pass before Constitution Day [3].

Jung criticized attempts to hinder this process, saying, "Do not use tricks to abolish the supplementary investigation authority" [3].

Meanwhile, the opposition People Power Party is focusing its organizational strength on highlighting the implications of abolishing this authority [6]. The opposition argues that removing the prosecution's ability to conduct supplementary investigations could undermine the efficiency, and thoroughness, of criminal probes. This clash suggests that the leadership race will not only be a matter of internal party preference but a proxy battle over the future of the South Korean justice system [7].

“Do not use tricks to abolish the supplementary investigation authority”

Jung Chung-rae's bid for re-election ties the Democratic Party's internal leadership struggle to a broader systemic battle over prosecutorial power. By framing the abolition of supplementary investigation authority as a priority, Jung is positioning himself as a reformer of the judiciary, while the People Power Party is using the same issue to paint the Democratic Party as an obstacle to effective law enforcement.