To me this sounds like a dumb thing for Lehman to say. Even if true, what can Bush say? "We know where he is but don't have the troop strength to get him?" Kerry will pounce on this as supporting his contention that the war in Iraw diverted troops from capturing Osama. If Bush says it's "It's not true; we don't know where he is," then it feeds into the old "our war on terror is ineffective" argument. And if Bush goes in and gets him, it feeds into the "using the terror war to support his campaign" schtick.
Unless I'm missing something, I think Lehman should keep his lips buttoned on intelligence info. That said, I repsect him and DO hope I'm missing something here.
They are probably trying to scare him into moving. Everyone here takes everything at face value. Sometimes you say things to make the other guy do things.