The Truth-o-Meter says: Half-True | Joe Biden says Mitt Romney, Paul Ryan would 'eliminate the guarantee of Medicare.'

During the vice presidential debate in Danville, Ky., Joe Biden attacked the Republican ticket’s proposal for Medicare. Mitt Romney and Paul Ryan, Biden said, would "eliminate the guarantee of Medicare." We tackled this point when President Barack Obama made a similar point in September. We asked: Are there "guaranteed benefits" for Medicare today? And if so, would they be at risk if Romney wins? A lot of it depends on how you define these words. What guarantees exist under Medicare today? Probably the clearest -- and ...

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