The new charter, which the secularist opposition says betrays Egypt’s 2011 revolution by dangerously mixing religion and politics, has polarized the Arab world’s most populous nation and prompted occasionally violent protest on the streets.

Results announced on Tuesday showed Egyptians had approved the text with about 64 percent of the vote, paving the way for a new parliamentary election in about two months.

The win in the referendum is the Islamists’ third straight electoral victory since veteran autocrat Hosni Mubarak was toppled in 2011, following parliamentary elections last year and the presidential vote that brought Mursi to power this year.

Mursi’s government, which has accused opponents of damaging the economy by prolonging political upheaval, now faces the tough task of building a broad consensus as it prepares to impose unpopular austerity measures to prop up the economy.