Nothing, but he's too timid to make a decision so he keeps voting "present", kicking the can down an ever-shortening road.
Geraldo was on Fox & Friends this morning demanding that ISIS troops be hit on the road to Bagdad.
Obama won't do anything unless he hears a concerted demand from the left wing of the Democratic Party, and they are too busy saying the mess is all George W. Bush's fault to think ahead to what it will mean for ISIS to control all or most of Iraq.
Iraq may come to illustrate what Jesus spoke of in Luke 11.24-26 ("the last state of that man is worse than the first").