Hmm, honestly I think it's rather ironic that Batman Begins and The Dark Knight were filmed in Chicago, which is known for it's corruption (as is Gotham) and of course Obama hails from Chicago. You could say that the Joker was the ultimate 'Community Organizer' and certainly embodies the tenets of Saul Alinsky, in which anarchy must be achieved in order to have an excuse to exert power through governmental means.