A Tunisian opposition alliance renewed calls on Monday for a boycott of a July 25 referendum on a new constitution promoted by President Kais Saied, despite the publication of an amended draft. The draft constitution is the centrepiece of Saied’s programme to overhaul Tunisia’s political system, but rivals say the text confirms fears he is seeking to reinstall an autocracy in the birthplace of the 2011 Arab Spring uprisings. “We call on Tunisians to boycott this illegal, unconstitutional process that aims to legitimise a coup d’etat,” veteran opposition figure Ahmed Nejib Chebbi, leader of the…