McMaster had purged Derek Harvey, one of the NSC's best people on the Middle East, for trying to fire Obama holdovers. "In the late 1980s, Harvey traveled throughout Iraq by taxicab—500 miles, village to village—interviewing locals, sleeping on mud floors with a shower curtain for a door. He [was] full of questions, intensely curious and entirely nonthreatening. After the 1991 Gulf War, when the CIA was predicting the inevitable fall of Iraqi dictator Saddam Hussein, Harvey, then a major, insisted that Hussein would survive because members of the Sunni community knew their fortunes were tied to his. He was right....