Iraqi Speaker of Parliament Salim al-Jabouri shows his ink-stained finger after casting his vote at a polling station during the parliamentary election in Baghdad, Iraq May 12, 2018 / AHMED JADALLAH / REUTERS

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Iraqi people show their ink-stained fingers after casting their votes at a polling station during the parliamentary election in Basra, Iraq May 12, 2018. / ESSAM AL-SUDANI/ REUTERS

BAGHDAD/KIRKUK - Iraqis began voting in the first parliamentary election on Saturday since defeating Islamic State, but few people expect its new leaders to deliver the stability and economic prosperity that have long been promised.Voting stations opened in Baghdad and other cities, Reuters reporters said.The oil producer has struggled to find a formula for stability since a U.S.-led invasion toppled dictator Saddam Hussein in 2003, and many Iraqis are disappointed with their politicians.The three main ethnic and religious groups -- the majority Shi'ite Arabs and the Sunni Arabs and Kurds -- have been at odds for decades, and the sectarian divisions remain as deep as ever.Much of the northern city of Mosul was reduced to rubble in fighting to oust Islamic State, and it will require billions of dollars to rebuild. The economy is stagnant.Sectarian tensions, which erupted into civil war in 2006-2007, are still a major security threat. And Iraq's two main backers, Washington and Tehran, are at loggerheads.Some voters voiced their doubts that the new parliament would be able to tackle the challenges faced by Iraq."I will participate but I will mark an 'X' on my ballot. There is no security, no jobs, no services. Candidates are just looking to line up their pockets, not to help people," said Jamal Mowasawi, a 61-year-old butcher.Incumbent prime minister Haider al-Abadi is considered by analysts to be marginally ahead, but victory is far from certain.Once seen as ineffective, he improved his standing with the victory against Islamic State, which had occupied a third of Iraq.But he lacks charisma and has failed to improve the economy. He also cannot rely solely on votes from his community as the Shi'ite voter base is unusually split this year. Instead, he is looking to draw support from other groups.Even if Abadi's Victory Alliance list wins the most seats, he still has to negotiate the formation of a coalition government, which must be concluded within 90 days of the election."It's the same faces and same programs. Abadi is the best of the worst; at least under his rule we had the liberation (from Islamic State)," said 50-year-old fishmonger Hazem al-Hassan.His two main challengers, also Shi'ites, are his predecessor Nuri al-Maliki and Iranian-backed Shi'ite militia commander Hadi al-Amiri.Amiri spent more than two decades fighting Saddam from exile in Iran. The 63-year-old leads the Badr Organisation, which was the backbone of the volunteer forces that fought Islamic State.He hopes to capitalize on his battlefield successes. Victory for Amiri would be a win for Iran, which is locked in proxy wars for influence across the Middle East.DISILLUSIONBut many Iraqis are disillusioned with war heroes and politicians who have failed to restore state institutions and provide badly needed health and education services.Critics say Maliki's sectarian policies created an atmosphere that enabled Islamic State to gain sympathy among some Sunnis as it swept across Iraq in 2014.Maliki was sidelined soon afterward, having been in office for eight years, but he now trying to make a comeback.In contrast to Abadi, with his cross-sectarian message, Maliki is again posing as Iraq's Shi'ite champion, and has proposed doing away with the unofficial power-sharing model under which all main parties have cabinet representatives.Iraq's Sunni minority had dominated key positions in government during Saddam's brutal rule.Maliki, who pushed for U.S. troop withdrawals, and Amiri, who speaks fluent Farsi and spent years in exile in Iran during Saddam's time, are both seen as much closer to Tehran than Abadi.The post of prime minister has been reserved for a Shi'ite, the speaker is a Sunni, and the ceremonial presidency has gone to a Kurd - all three chosen by parliament.More than 7,000 candidates in 18 provinces, or governorates, are running this year for 329 parliamentary seats. "There is no trust between the people and the governing class," said Hussein Fadel, a 42-year-old supermarket cashier. "All sides are terrible. I will not vote."