CAIRO (AP) — Egypt’s liberal opposition called for more protests Sunday, seeking to keep up the momentum of its street campaign after the president made a partial concession overnight but refused its main demand he rescind a draft constitution going to a referendum on Dec. 15.

President Mohammed Morsi met one of the opposition’s demands, annulling his Nov. 22 decrees that gave him near unrestricted powers. But he insisted on going ahead with the referendum on a constitution hurriedly adopted by his Islamist allies during an all-night session late last month.