Stan Greenberg has accused Mark Penn of rigging his polls. Penn says he does no such thing. Ben Smith notes that Greenberg's accusation "brings out into the open a criticism of Penn that had come, before, largely from anonymous sources." I'll add to that that. When I wrote my piece on Mark Penn, quite a few pollsters e-mailed the same criticism to me. Whether that's professional jealousy, a lack of transparency on Penn's part -- he doesn't release raw numbers -- or actually rigged polls is hard to say. But it's certainly out there. It would be nice if Greenberg gave some examples and forced Penn to offer a more specific defense. DOES MARK PENN RIG HIS POLLS?
Stan Greenberg has accused Mark Penn of rigging his polls. Penn says he does no such thing. Ben Smith notes that Greenberg's accusation "brings out into the open a criticism of Penn that had come, before, largely from anonymous sources." I'll add to that that. When I wrote my piece on Mark Penn, quite a few pollsters e-mailed the same criticism to me. Whether that's professional jealousy, a lack of transparency on Penn's part -- he doesn't release raw numbers -- or actually rigged polls is hard to say. But it's certainly out there. It would be nice if Greenberg gave some examples and forced Penn to offer a more specific defense. 
