Hundreds of people demonstrated in Tunis on Sunday in a second day of protest against a constitutional referendum called by President Kais Saied that his opponents say would cement his hold on power. The demonstration was organised by the Salvation Front, a coalition including the moderate Islamist Ennahda, the largest party in a parliament that Saied dissolved in March. It followed a similar protest on Saturday called by the Free Constitutional Party over the referendum, and a strike on Thursday by a powerful labour union over government economic reform plans, which brought much of the county…