Nine parties are currently eligible to run in Turkey's elections. Four of them — the ruling Justice and Development Party (AKP), the main opposition Republican People’s Party (CHP), the pro-Kurdish Peoples’ Democratic Party (HDP) and the Nationalist Movement Party (MHP) — are represented in parliament. The others include the nationalist Great Union Party, the neo-nationalist Kemalist Patriotic Party (VP) and three Islamist outfits — the Felicity Party (SP), the Independent Turkey Party and the Kurdish-dominated Free Cause Party (Huda-Par).

From the nine parties’ positions on the April 16 referendum, the battle lines are emerging ahead of the critical vote. The plebiscite will determine whether the constitution will be changed to replace Turkey’s parliamentary system with an executive presidency designed to grant sweeping powers to President Recep Tayyip Erdogan. The yes camp, led by the AKP and the MHP, has been joined by Huda-Par. The naysayers, meanwhile, have emerged as a rather heterogeneous group. The CHP, HDP, VP and SP, which have all announced they will campaign against the changes, represent a motley crew of social democratic, neonationalist, Kurdish and Islamist forces.

The narrative of the yes camp rests on the notion that Turkey should have a stronger leadership and mobilize against myriad external threats to preserve its stability and grow stronger. The no camp emphasizes two themes. The CHP and the HDP say the constitutional changes will install a one-man regime and plunge Turkey into autocracy, while the SP and the VP highlight the danger that the regime shift will lead to further polarization and weaken the country.

Opinion polls suggest the race is tight and neither side has managed to take a convincing lead. An important segment of AKP voters remains undecided, while the MHP base is bitterly divided amid a deepening rift between the party leadership and a group of dissident heavyweights.