The NAC members who left the assembly are Abdul Jalil Mostafa, the coordinator of the association; Jaber Gad Nasser, a constitutional law professor at Cairo University; and Samir Morqos, a political researcher. Nasser was one of the plaintiffs in the case which resulted in the first Constituent Assembly being disbanded by an administrative court.
The NAC members released a statement saying, “The newly-declared Constituent Assembly is not significantly different from the first formation, which an administrative court ruled invalid because it was based on party representation and not national representation as a whole.”
Meanwhile, the Muslim Brotherhood Twitter account has sent a message that "Parliament is staying," whatever that means. The Guardian is cataloging the responses, which range from the assessment that the statement shows pure delusion to strong defiance.