you know, wrestling with these issues, i'm sure that for him he's saying to himself, i could do a really good job. >> a new national cbs poll released on the eve of the debate shows hillary clinton holding her solid lead at 46% with bernie sanders holding steadily in second place at 127% and joe biden running third to bernie sanders at 16%. that same poll shows that if joe biden is not a candidate hillary clinton would get two-thirds of biden's supporters pushing her up to 56% and bernie sanders would pick up the rest and move up to 32%. joining us now richard wolffe, executive editor of msnbc.com and margie, democratic pollster for purple strategies. margie, these polls with biden in, biden out, clearly show that he does more damage to hillary clinton than to bernie sanders, but what they don't show is any upward movement for him over the last, say, 60 days.