Where in the world is Alan?

After writing about McAuliffe's milktoast disposition (below), when thinking of a brilliant, go-for-the-jugular, attack-dog style that could do some real damage to the Republicans, the person that quickly came to mind was Alan Dershowitz. I used to enjoy watching him on the Hardball-type shows at night, but I must ask: where is he? It's like he fell off the face of the planet. Why isn't he on the talk shows anymore, esp. since we know he's not publicity-shy??