At my Barnes and Noble they don't even pretend to care. All the anti-Bush books are together on a five foot high standing rack when you walk in. Hannity's book was in a pile on the floor in the back.
Hanity has a book out? ;->
And folks should keep this in mind: If a big box bookseller doesn't want it, chances are less likely that a book will get published. So they're deciding what sells in more ways than one.