Ramadi falls. The Iraqi army flees. The great 60-nation anti-Islamic State coalition so grandly proclaimed by the Obama administration is nowhere to be seen. Instead, it’s the defense minister of Iran who flies into Baghdad, an unsubtle demonstration of who’s in charge — while the U.S. air campaign proves futile and America’s alleged strategy for combating the Islamic State is in free fall. It gets worse. The Gulf States’ top leaders, betrayed and bitter, ostentatiously boycott President Obama’s failed Camp David summit. “We were America’s best friend in the Arab world for 50 years,” laments Saudi Arabia’s former intelligence chief....