In the first column, we see Barack Obama holding his head, as if he's got a headache.
The middle column shows 2 politicians, both governors, gesturing outward, not holding anything.
The third column shows a bear holding a slice of watermelon and George Bush holding a little African orphan, grasping his/her head.
That is to say, the outer columns feature hands (or paws) holding something, and in 2 of the 3 pictures, what is held is a black person's head, and in the other what is held is watermelon.
.@annalthouse You forgot to mention that the governors are pointing up, which is code for "uppity." althouse.blogspot.com/2012/07/hands-…
— James Taranto (@jamestaranto) July 7, 2012