Let's analyze the photograph of the presidents.

1. It's nice that they're all smiling naturally. A good picture.

2. The oddest thing is the way Bush2 is leaning over into Obama's space. It's as if he were saying "I'm with these guys." By contrast, no one seems to want to be anywhere near Jimmy Carter.

3. There are 4 different hand positions. Jimmy and Bush2 match with the hands at the side look, which seems best, since 2 of them are doing it. Obama's gentle handclasp is vaguely prayerful, symbolizing hope, resonating his campaign theme. Bush1 has his hands in his pockets, which seems as though he's not paying attention. Hands behind the back — Clinton — in body language, this says I've got something to hide. I heard on the radio that Clinton complimented Bush2 on the new carpet — that nutty gold starburst that reminds me of an Obama poster — and maybe Clinton's thinking about the embarrassing incidents in which he was involved and which may have motivated Bush2 to recarpet.

IN THE COMMENTS: Christopher Althouse Cohen says:

Obama used that hand position throughout the campaign. When I went to a Hillary rally, not only did she use that hand position, but all her supporters (including Chelsea, Ted Danson, and Mary Steenburgen) all had their hands in the exact same position.

Oh, no! It's a secret signal!