On 12 September, both Secretary of State, John Kerry and National Security Adviser, Susan Rice were still calling the airstrikes a "counter-terrorism operation," while acknowledging that some in the administration wanted to call it a "war." But the pressure from the Pentagon and its counter-terrorism partners to upgrade the operation to a "war" was so effective that it took only one day to accomplish the shift.
The following morning, military spokesman, Admiral John Kirby told reporters: "Make no mistake, we know we are at war with [IS] in the same way we are at war, and continue to be at war, with al-Qaeda and its affiliates." Later that day, White House press secretary, Josh Ernst used that same language.
Under the circumstances that exist in Iraq and Syria, the most rational response to IS's military successes would have been to avoid US military action altogether. But Obama had powerful incentives to adopt a military campaign that it could sell to key political constituencies. It makes no sense strategically, but avoids the perils that really matter to American politicians.
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