All Romney/Ryan are doing is trying to hide from the American public just how badly they would shred the social safety net in order to pay for giving themselves giant tax cuts.
Ryan actually included the savings from cuts to wasteful private subsidies in the Medicare Advantage program that the ACA enacted—the same ones he now inveighs against in every speech—in his own budget. The reason he kept them in his budget, even while he votes to repeal the ACA and therefore would lose them, is because it gives him more breathing room. Take away those savings, and Ryan would have to come up with even more cuts to other popular programs.
The Obama campaign is understandably aggravated by their opponents’ cowardly refusal to stand and fight.
I’ll bet that Gary Johnson, Libertarian Party and Jill Stein, Green Party, would have a good and useful debate on Medicare.