It’s not a USA Today poll. They simply sponsor it and I believe it was in recent years. This is the standard bearer Gallup as opposed to their more recent tracking poll creation.
Gallup Daily: Obamas Edge Shrinks to 2 Points
Gallup Daily: Obama 49%, McCain 43% (McCain/Palin gain 2% since yesterday)
Gallup Daily: Obama-Biden Ticket Leads by 6 Points
Gallup Daily: Obama Continues to Lead 49% to 41% (Bump stops cold - 8/30/08)
Gallup Daily: Obama Moves Ahead, 48% to 42%
If you're still not convinced I can't help you. I'm through wasting my time pointing out the obvious.