He first became a member of the Senate after the 1996 Romanian legislative election, on Romanian Democratic Convention lists, and served as the Senate Quaestor. Morțun again won a seat during the 2004 Romanian legislative election, as a candidate of the Justice and Truth Alliance .
He first took his place in the Senate following the 1996 Romanian parliamentary vote, on Romanian Democratic Convention platforms, and held the role of Senate Quaestor. Morțun secured another spot in the 2004 Romanian parliamentary election, as a candidate of the Justice and Truth Coalition.