In the spirit of keeping up with current events I have discovered an interesting article on gamasutra entitled "Persuasive Games: The Birth and Death of the Election Game." It mainly talks about the role that candidate sponsored video games play in campaign process. My only experience so far with campaigns in a virtual environment has been in Second Life. During the primaries John Edwards had set up a small virtual campaign headquarters, but it was very disappointing to to say the least. Not only was there little to no information about the candidate, but they where giving away the most atrocious shoes in all of Second Life for my avatar to wear. Obama is going a different route then Edwards by buying in game advertisement space in select video games, but it is just that an advertisement. In this election none of the candidates have actually done anything official that informs people of their stance on issues or policies they wish to implement in a digital space, but maybe that's what is in store next election.
In the mean time you can check out the article here http://www.gamasutra.com/view/feature/3834/persuasive_games_the_birth_and_.php?page=3