Obama and his spokespeople are always quick to make two points: first, that no American ground forces will be sent into combat against the Islamic State in Iraq and Syria (ISIS), and second, that the United States will merely be part, albeit a leading part, of a broad coalition of Arab and NATO countries.

The Obama administration's emphasis on these points strongly suggests that Americans would not support a war against ISIS fought solely by the United States with American ground troops as part of the effort.

In his speech at MacDill Air Force base on September 17, Obama said,

As your Commander-in-Chief, I will not commit you and the rest of our Armed Forces to fighting another ground war in Iraq. After a decade of massive ground deployments, it is more effective to use our unique capabilities in support of partners on the ground so they can secure their own countries' futures. And that's the only solution that will succeed over the long term.