Picture of the Day (Tom DeLay Honorary "Grin and Bear It" Edition)
Yup, that's his mugshot.
Why is he smiling?
Because he knows that his upcoming trial, along with the alignment of the stars in the Cassiopeia constellation, will force the return of the Christ-Child and thus his inevitable final battle with the Nazarene.
If you don't get the joke, I'm not spelling it out for you.