The scene at Invesco...

Clear skies over Invesco. The press was allowed in this morning, with "real people" being let in around 1 p.m. An army of cameras already set up by 11 a.m. A Greek temple — or is it a Federal building? — has been constructed as the backdrop for tonight's festivities...

Right-wing commentators have called it the "Temple of Obama."

That may sound silly, but the buzz on Invesco is that it is indeed a slightly odd piece of stagecraft. (Here's a YouTube video from Cox Newspapers Ken Herman at Invesco, with worried comments from Democratic pollster Stan Greenberg.)

Lots of rehearsals going on as we came onto the field itself. Tom was at one point up on the wing of the stage, as Stevie Wonder and his conga-playing band swayed to the sweet harmonies.

Al Gore made an appearance on stage, took a look around, and prepared for his big speech. Sheryl Crow came out, strumming her song "A Change Would Do You Good." She seemed right on message. An Obama staffer instructed a brigade of volunteers to fill any empty seats, if needed. We'll see...