Question on Bush-Abramoff photo

The White House has acknowledged that the Bush-Abramoff picture is "authentic," (there was a question?) but their story of its circumstance just doesn't add up.

White House spokesman Allen Abney said the photo was taken in 2001, when the president dropped by a meeting of about two dozen state legislators to thank them for supporting tax relief.

Originally, the White House said it had no record of Abramoff's attendance at the meeting.

So the question isn't whether Bush knew Abramoff was in this meeting; the question is who let Abramoff into the White House to, in effect, lobby legislators in the White House?

As far as I know, you can't just walk up to the front gate and say, I'd like to go inside the White House now, please, which means that Abramoff was there on somebody's say so. Also, I'm pretty sure that once you're inside, you not allowed to just wander around and look for something interesting.

So, somebody signed Abramoff in to meet with, and ostensibly lobby, those legislators inside the White House. Somebody on Bush's staff either wanted that meeting to take place or did Abramoff a favor knowing it would take place. Who was it?

And this is just one time he was signed in. I don't really care about the pictures, that's mostly for political hay. I'm far more concerned with what took place between Abramoff and the policymaking staff.