Both Iran , United States want to quell the ISIS militant surge in Iraq . Secretary of State Kerry suggests possible cooperation with Iran . The report raises questions in Washington . Cooperation with Iran might be a necessary evil , retired army general says .
Both Iran , United States want to quell the ISIS militant surge in Iraq . Secretary of State Kerry suggests possible collaboration with Iran . The issue raises questions in Congress . Working with Iran might be a necessary evil , retired U.S. general says .