The global coalition against the Islamic State group met Wednesday in Morocco to coordinate efforts to prevent a new insurgency in the Middle East and North Africa. US Secretary of State Antony Blinken was due to have co-hosted the meeting with Moroccan Foreign Minister Nasser Bourita, but Washington’s top diplomat tested positive for Covid-19 and was replaced by senior diplomat Victoria Nuland. Senior officials from dozens of other countries also attended the meeting, the coalition’s first yearly ministerial summit on African soil, under high security at a discreet luxury hotel in Marrakesh. …