No army in Mid East is challenging ISIS. Iran regroups to defend S. Iraqi Shiites, Assad to save Damascus
If you think Obama will destroy ISIS or deter Iranian nukes or allow a new president to replace him soon I think you are mistaken. Expect him to allow ISIS to thrive and to use them for a crisis by 2016 that allows the suspension of elections indefinitely.
Read - Antichrist 2016-2019: Mystery Babylon, Barack Obama & the Islamic Caliphate