"The President is right to provide humanitarian relief to the Iraqi civilians stranded on Mount Sinjar and to authorize military strikes against ISIS forces that are threatening them, our Kurdish allies, and our own personnel in northern Iraq. However, these actions are far from sufficient to meet the growing threat that ISIS poses. We need a strategic approach, not just a humanitarian one.

"A policy of containment will not work against ISIS. It is inherently expansionist and must be stopped. The longer we wait to act, the worse this threat will become, as recent events clearly show."

U.S. Lindsey Graham, R-S.C.

"While I believe that President Obama's decision last night to conduct 'targeted' airs trikes in Iraq, coupled with additional humanitarian aid, is now necessary, it underscores the absence of a long-term strategy in the region by this administration. The threat posed by the ISIS has been known for months, and the lives of countless Iraqi citizens, including tens of thousands of innocent Iraqi Christians and ethnic minorities in the country, are in danger.

"The lack of foresight from the White House is disappointing, and I certainly hope these targeted strikes are not too little too late. The administration needs to quickly lay out a clear, long-term vision and strategy for our actions in the region."

U.S. Sen. Tim Scott, R-S.C.

"I am deeply concerned by the gains made by ISIL in Iraq. ISIL is a threat not only to Iraq but also to the rest of the region and the homeland, and I support President Obama's decision to send humanitarian and military aid. Ultimately, there is no substitute for political accommodation between all elements of Iraqi society to join together and expel the ISIL extremists from their country. In the meantime, though, while I agree with the President that American ground troops should not return to Iraq, we must assist the Iraqis in their efforts to stop militant gains and prevent humanitarian catastrophe."

U.S. Rep. Jim Clyburn, D-S.C.

"Military involvement, I think, is much more complicated and it brings with it a whole host of unforeseen reactions in that part of the world.

"I think that the issue is that we've fallen into the pattern of presidents ordering air strikes without the debate that the Founding Fathers intended. ... Congress is the only one that can authorize the use of force."

U.S. Rep. Mark Sanford, R-S.C.