First, George W. Bush said he didn't "spend much time" on Bin Laden. Then President Obama, with laser focus, hunted down Bin Laden and killed him. And now Mitt Romney's people don't think he mattered too much because al-Qaeda is somehow stronger than ever. Here's Mitt Romney foreign policy adviser Walid Phares:
"Al Qaeda after Bin Laden’s killing is stronger everywhere it has a presence. From Yemen to Somalia, to the Sahel, as wel [sic] as in Pakistan and Afghanistan, al Qaeda has more militants, more battlefields and a new generation of commanders. Killing Bin Laden was one single operation in a war that is raging and growing."
It's worth noting here that most of al-Qaeda's leadership has been killed or captured under President Obama. So it's not "one single operation," either.