Newark Mayor Cory Booker says he plans to honor a Twitter challenge and live on food stamps for at least a week. In a Twitter exchange Sunday, Booker and a user named TwitWit discussed government funding for school meals. Booker suggested they both try living on food stamps for a week or month. Booker said Tuesday he is setting up the rules. He must figure out how much they can spend on food and how long the challenge will last.