The new law changes each of the country's 18 provinces into several electoral districts, with one legislator elected per 100,000 people.
Iran is accused of using its paramilitary proxy group to move missiles in turmoil-hit Iraq, which is caught in a tug of war between Iran and the US.
Iraqi Prime Minister Adil Abdul Mahdi insists on a political reconciliation rather than early elections, but the leaders of the two largest blocs in the parliament insist he must step down.
Memes, songs and slogans are driving the countrywide protests, but some people have started to differ on the language and choice of words used, exposing the fault lines among the demonstrators.
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