Twice designated a terrorist by the United States government, considered responsible for up to 20 percent of American casualties in the Iraq war, Major General Qasem Suleimani, the legendary Iranian spymaster and leader of the Quds Force – the elite special operations wing of the hardline Revolutionary Guard Corps (IRGC) – is now stirring alarm in Washington for doing something the Obama administration would ordinarily cheer: taking the fight to ISIS in Iraq.