Moderate politicians have accused the 12-member body of disqualifying rivals to hardline candidates, who are expected to dominate the race. Turnout may be hit by restricted choice on the ballot and rising discontent over an array of political, social and economic crises. Within Iran's complex mix of clerical rulers and elected officials, Khamenei has the final say on all state matters such as nuclear and foreign policies. But the elected president will be in charge of tackling worsening economic hardship. Saeed Jalili, a former chief nuclear negotiator who two decades ago ran Khamenei's office for four years, was the first heavyweight hardliner to register for the election on Thursday.