Islamabad: Dissident senator of Balochistan National Party (Mengal) Qasim Roonjho jas resigned from membership of Senate.He filed his resignation with secretary Senate.Qasim Roonjho is parliamentary leader of BNP (Mengal) in Senate.Sardar Akhtar Mengal, chief of BNP (Mengal) had sought resignation from both of the senators.Senator Nasima Ahsan and Senator Qasim Roonjho had crossed the floor in favor of constitutional amendment.