McCain & Graham: ISIS Poses Direct Threat To U.S.

McCain & Graham: ISIS Poses Direct Threat To U.S.
(Washington, DC) -- Two GOP senators claim the ISIS militant group now poses a direct threat to the U.S. John McCain of Arizona and Lindsey Graham of South Carolina told CBS' "Face The Nation" the U.S. must use air strikes to stop the radical Islamist group. McCain also said the U.S. should have left some ground troops in Iraq to help combat extremism.