NBC News' Courtney Kube cites two defense officials on the Pentagon weighing whether to commit U.S. airstrikes against ISIS in the Philippines:

• "The authority to strike ISIS targets as part of collective self-defense could be granted as part of an official military operation that may be named as early as Tuesday, said the officials. The strikes would likely be conducted by armed drones."
• "If approved, the U.S. military would be able to conduct strikes against ISIS targets in the Philippines that could be a threat to allies in the region, which would include the Philippine forces battling ISIS on the ground in the country's southern islands."
• Why it matters: "Last month, the vice chairman of the U.S. Joint Chiefs endorsed the idea of naming the mission in the Philippines, saying that naming it would provide more funding."