Margareth S. Aritonang, Jakarta – Controversial Democratic Party (PD) lawmaker Ruhut Sitompul warned he would expose the "dark records" of those colleagues opposing his inauguration, which is slated for next Monday.

Lawmaker Martin Hutabarat from the House of Representatives' Commission III overseeing law and human rights said on Thursday that the House's leadership was set to formalize Ruhut's appointment after earlier postponing it over rejections.

"Pak Priyo will lead the ceremony on Monday," Martin said, referring to House Deputy Speaker Priyo Budi Santosa of the Golkar Party.

Ruhut has repeatedly issued warnings that he would reveal corruption that allegedly involved several of his colleagues from Commission III, particularly those who had strongly opposed his appointment.

"I have collected information about several people who have been strongly against my appointment as chairman of Commission III," Ruhut said. "I'm ready to expose this information [if they still oppose the inauguration]," he emphasized.

Several Commission III members succeeded in canceling Ruhut's inauguration last week, arguing he lacked the competence to lead the prestigious commission.

Some of his strong critics, such as Desmond Junaidi Mahesa from the Great Indonesia Movement (Gerindra) Party and Ahmad Yani from the United Development Party (PPP), also questioned Ruhut's alleged problematic past due to a previous marital status dispute with his former wife Anna Rudhiantiana Legawati.