CAIRO – Egypt’s media are demonizing the Muslim Brotherhood as the state’s worst enemy, claiming the fundamentalist group plans to plunge the country into chaos if its candidate does not emerge as the winner of the presidential runoff election.

Results of the weekend election were set to be announced Thursday, but officials postponed the declaration, setting off a wave of charges of manipulation aimed at all sides, including the ruling military.

The Brotherhood escalated its fight with the military, calling for a mass protest today to denounce what it called a power grab by the generals. Three major Islamist groups said Thursday they would join the protest in Tahrir Square, birthplace of the uprising that forced Hosni Mubarak out of office last year.