Egypt's opposition is leading mass protests to reject the Islamist-backed draft constitution, days after President Morsi claimed victory in the first round of voting amid allegations of polling violations, International Christian Concern reports. The National Salvation Front, a coalition led by Nobel Peace Prize laureate Mohamed ElBaradei, called for mass demonstrations Tuesday to urge rejection of the constitution, which was finalized by the Islamist-dominated constituent assembly after Christians and secular parties had pulled out of it, alleging marginalization. Ten of Egypt's 27 districts cast ballots Saturday, Dec. 15 -- following which the Muslim Brotherhood claimed the constitution was approved by 57 percent of those who voted -- and voting in the remaining governorates is scheduled for this coming weekend. The constitution must be approved by more than 50 percent of voters who cast ballots. According to rights groups, irregularities and violations marred Saturday's voting -- including the presence of Muslim Brotherhood members at the polls, women being prevented from voting because they weren't wearing Islamic veils, and Christians being denied entry to polling stations.