BIDEN: I think that -- that Bernie is speaking to a yearning that is deep and real, and he has credibility on it. And that is the absolute enormous concentration of wealth in a small group of people with the new class now being able to be shown being left out. There used to be a basic bargain. If you contributed to the profitability of an enterprise, you got to share in the profit. That's been broken. Productivity is up, wages are stagnant.

BORGER: But Hillary's talking about that, and....

BIDEN: Well, it's -- but it's -- it's relatively new for Hillary to talk about that. Hillary's focus has been other things up to now, and that's been Bernie's -- no one questions Bernie's authenticity on those issues.