He is waiting for them to just go away; won’t happen.
Check it out:

President Obama acknowledged Sunday that U.S. intelligence officials “underestimated” the threat posed by the Islamic State and overestimated the Iraqi army’s capacity to defeat the militant group.

The president said in an wide-ranging interview on CBS’ “60 Minutes” that the Islamic State militants went “underground” after being squashed in Iraq and regrouped amid the Syrian civil war.

“During the chaos of the Syrian civil war, where essentially you have huge swaths of the country that are completely ungoverned, they were able to reconstitute themselves and take advantage of that chaos,” Obama said