Keep U.S. safe? neither Bush did that nor Obama yet their devotees continue to believe that blowback is a fantasy...oh brother. 
After 9/11, there was not a terrorist attack since then on U.S soil. I give credit to the Bush administration for that, not Obama. It was the Bush policies that keeps us safe and it is the Bush intelligence gathering that got Bin Laden. Obama looked upset that he had to make the call to get Bin Laden.