Co-chairs of HDP and DBP , 11 parliamentarians and 83 co-mayors vote for referandum in prisons they kept 2017-04-16 15:21:25 ANKARA – 13 parliamentarians of HDP included co-chairs and 83 co-mayors of DBP voted for referendum in prisons. Imprisoned 13 HDP (Peoples’ Democratic Party) parliamentarians included co-chairs Figen Yüksekdağ and Selahattin Demirtaş , co-chair of DBP (Democratic Regions Party) Sebahat Tuncel and 83 co-mayors had voted for referendum in prisons they are kept.