On Nov. 5, the Republican People's Party sent Suheyl Batum to the party's top disciplinary body, demanding his expulsion.
The decision comes in the wake of the resignation of the party's Ankara deputy Emine Ulker Tarhan on Oct. 31.
Like Tarhan, Batum was one of the lawmakers who had previously called for the party leader, Kemal Kilicdaroglu, to step down following the candidate’s poor showing in the country's August presidential election.
Suheyl Batum is the first deputy to be expelled from the party during Kilicdaroglu's term as party leader. Batum told reporters on Thursday that many in the party were dissatisfied with the way decisions were being made within the organization.