Iranian militia leader Hadi al-Amiri, one of several identified as leading an attack on the U.S. embassy in Baghdad on Tuesday, reportedly visited the White House in 2011 during the presidency of Barack Obama. On Tuesday, a mob in Baghdad attacked the U.S. embassy in retaliation against last weekend’s U.S. airstrikes against the Iran-backed Shiite militia Kataib Hezbollah (KH), responsible for killing an American civilian contractor. KH is one of a number of pro-Iran militias that make up the Popular Mobilization Forces (PMF/PMU), which legally became a wing of the Iraqi military after fighting the Sunni Islamic State terrorist group....