BAGHDAD - Iraq's Popular Mobilization on Sunday called on the Iraqi government to ban US nationals from entering Iraq and to expel those who are already in the country, in a reaction to the new US travel curbs on Iraqis. Popular Mobilization is mainly a coalition of Shi'ite paramilitary groups armed and trained by Iran to fight Islamic State. It became an Iraqi government-approved body last year. The call to ban US nationals came in a statement published by its spokesman, Ahmed al-Assadi.