His comments today came after Defense Secretary Ash Carter over the weekend criticised Iraqi forces, saying their men fled the Islamic State advance on Ramadi without fighting back.
Obama did not respond to questions about Carter's comments. But he did say the challenge posed by the Islamic State in Iraq and Syria and the turmoil in Libya have forced NATO to look south as well as east in the alliance's mission.
"It also means we have to think about whether we are deploying and arranging our assets effectively to meet that challenge," Obama said.
Iraq has announced the launch of a major military operation to drive the Islamic State from the western Anbar province. The Iraqi troops are out to retake the Sunni heartland where the extremist group captured the provincial capital of Ramadi.