Marijuana is illegal because uh uh

One member of the press corps, however, brought up the fact that marijuana legalization is a serious subject to many people, particularly with Mexico right now, and when Gibbs didn't really respond, the reporter asked him to explain "Why?" "Why he feels that way about legalizing marijuana?"

From:
http://blogs.salon.com/0002762/2009/03/29.html#a3384