Presidential Ordinance Cannot Change Senate Polls Procedure: PDM Leaders Opposition alliance’s president warns government will not be allowed to act unconstitutionally A presidential ordinance cannot legally change the procedure of Senate elections, which requires a constitutional amendment, leaders of the opposition’s Pakistan Democratic Movement (PDM) said on Thursday. Addressing media in Karachi, PDM President Fazlur Rehman, who also heads the Jamiat Ulema-e-Islam, said that the government’s “fear” of the opposition was evident in its desire to stage the Senate elections ahead of schedule. He said that the PDM’s successful public gatherings had worried the Pakistan Tehreek-e-Insaf-led government, adding that the opposition would not allow it to indulge in unconstitutional acts.