Many Missteps in Assessment of ISIS Threat

By late last year, classified American intelligence reports painted an increasingly ominous picture of a growing threat from Sunni extremists in Syria, according to senior intelligence and military officials. Just as worrisome, they said, were reports of deteriorating readiness and morale among troops next door in Iraq.

But the reports, they said, generated little attention in a White House consumed with multiple brush fires and reluctant to be drawn back into Iraq. “Some of us were pushing the reporting, but the White House just didn’t pay attention to it,” said...