So much for that! An Obama insider says the idea of helping Hillary with her debt went down very, very badly among supporters, donors, fundraisers, etc. This person says the most generous offer he could foresee would be Obama headlining a fundraiser for Hillary, but cautions that this is just speculation and might even be a stretch.
Of course, this could just be posturing--people often take hardline positions to gain leverage prior to negotiating. But I didn't get that impression. My sense is that the Obama people really are dead set against this.