Despite last week’s polling that showed a tightening race in North Carolina, Barack Obama rolled up a decisive victory there while Hillary Clinton holds a narrower lead in Indiana. Did Obama do what he had to do tonight to stabilize his campaign in the wake of the controversy involving his former pastor? Did Hillary Clinton do what she had to do to sustain the momentum of her last big win in Pennsylvania? Do the candidates have any new arguments to make to superdelegates based on tonight’s returns? Will this race stop when the voting stops in June or will it go all the way to the convention? Lawrence O'Donnell guest hosts.