Analysis: Iraqi Popular Mobilization Forces in Iran’s game plan | FDD's Long War Journal

"Although the PMF has left the option of pushing into eastern Syria on the table, and Akram al Kabi, head of Harakat al Nujaba, has gone as far as calling for marching into the Islamic State’s stronghold of Raqqa, the Iraqi militias would face difficult challenges advancing through and consolidating non-Shiite territory, especially without reliable air support."