CAIRO -- The association of judges here called Saturday for courts across Egypt to suspend all but their most vital activities to protest an edict by President Mohamed Morsi granting himself unchecked power by setting his decrees above judicial review until the ratification of a new constitution.
The judges' strike, which drew the support of the leader of the national lawyers' association, would be the steepest escalation yet in a political struggle between the country's new Islamist leaders and the institutions of the authoritarian government that was overthrown last year. As it spills into the courts and the streets, the dispute also increasingly threatens to undermine the credibility of Egypt's political transition as well.
A council that oversees the judiciary denounced Mr. Morsi's decree, which was issued Thursday, as "an unprecedented attack on judicial independence," and urged the president to retract parts of the decree eliminating judicial oversight.
State news media reported that judges and prosecutors had already walked out in Alexandria, and there were other news reports of walkouts in Qulubiya and Beheira, but those could not be confirmed.
Outside Egypt's high court in Cairo, the police fired tear gas at protesters who were denouncing Mr. Morsi and trying to force their way into the building, the second day in a row that protesters took to the streets over the presidential decree, which critics have assailed as a return to autocracy.
Abdel Meguid Mahmoud, a prosecutor appointed by Mr. Morsi's predecessor, Hosni Mubarak, declared to a crowd of cheering judges that the presidential decree was "null and void." He denounced what he described as "the systematic campaign against the country's institutions in general and the judiciary in particular."
A coalition of disparate opposition leaders including the liberal former United Nations diplomat Mohamed ElBaradei, the leftist-nationalist Hamdeen Sabahy, and the former Mubarak-government foreign minister Amr Moussa formed a self-proclaimed National Salvation Front to oppose the decree. In addition to demanding the dissolution of the constitutional assembly, the group declared that it would not speak with Mr. Morsi until he withdrew his decree.
"We will not enter into a dialogue about anything while this constitutional declaration remains intact and in force," Mr. Moussa said. "We demand that it be withdrawn and then we can talk."
As the judges group called for a suspension of the courts, a growing number of lawyers filed claims demanding that the courts seek to overturn Mr. Morsi's decree, joining the battle between the executive and judicial powers.
Advisers to Mr. Morsi, a former leader of the Muslim Brotherhood and Egypt's first democratically elected president, defended his action, saying he was trying to prevent the courts from disbanding the Islamist-dominated constitutional assembly, which is writing a new constitution. The nation's top courts had already dissolved the Islamist-led parliament and an earlier Islamist-led constituent assembly.
The advisers said a court decision on the new constitutional assembly had been expected as soon as next Sunday.
The judges' group, as well as the newly unified secular opposition, have demanded that Mr. Morsi withdraw his decree, and that he disband and replace the current constitutional assembly. Many of the assembly's non-Islamist members, including secularists and representatives of the Coptic Church, had already quit the body to protest the Islamists' domination.
The increasingly vocal criticism of the assembly threatens to undermine the legitimacy of the ultimate charter, and has only increased the likelihood that the Islamist leaders may seek to pass and ratify it on their own, over the opposition of other groups, further damaging its credibility.
The opposition to the decree has also reinforced the fears of Islamists that judges appointed by Mr. Mubarak and the secular opposition were deliberately seeking to derail the process rather than accept their defeats at the polls.
Strange alliances were formed in opposition to the decree. Activists and politicians who previously railed against Mubarak government cheered Saturday for the Mubarak loyalist who served as public prosecutor: Mr. Morsi's decree sought to replace him.
On Friday night, young supporters of the opposition parties set up a tent city for an open-ended sit-in in Tahrir Square, the center of the Egyptian revolt, and the groups have called for a demonstration there on Tuesday.
The Muslim Brotherhood, the Islamist group allied with Mr. Morsi, has called for rival demonstrations nearby on Sunday and on Tuesday, raising the possibility of street fights between the two sides. The Brotherhood demonstrations seek to support his moves as an effort to speed up Egypt's transition to a constitutional democracy. Mr. Morsi has pledged to relinquish his new powers when the constitution is ratified, perhaps as soon as four months from now.
Near the square, a few hundred young men engaged in an unrelated battle with the police that has been going on for more than five days. They were demanding retribution against security officers who killed more than 40 people and blinded others with birdshot in clashes a year ago. On Saturday they continued to throw rocks and occasionally homemade bombs at rows of riot police officers, who fired back with rocks of their own as well as volleys of tear gas.
The protesters had hung a yellow banner across the street declaring "No Entry to the Brotherhood." They blame the Muslim Brotherhood for failing to back them during last year's protests.
On Saturday, most appeared largely unconcerned, if cynical, about Mr. Morsi's decree, though some approved of his efforts to fire the Mubarak-appointed prosecutor and retry officials previously acquitted of responsibility for the killings. "A drop of honey in a pool of poison," said Hassan el-Masry, 19, who lost an eye during last year's clashes.
Nevine Ramzy and Mai Ayyad contributed reporting.world
This article originally appeared in The New York Times.