Paul Krugman has a must read column in the New York Times entitled "Politifact, R.I.P.":
This is really awful. Politifact, which is supposed to police false claims in politics, has announced its Lie of the Year — and it’s a statement that happens to be true, the claim that Republicans have voted to end Medicare.Read the complete column at the New York Times.
Steve Benen in the link above explains it, but let me just repeat the basics. Republicans voted to replace Medicare with a voucher system to buy private insurance — and not just that, a voucher system in which the value of the vouchers would systematically lag the cost of health care, so that there was no guarantee that seniors would even be able to afford private insurance.
It seems pretty clear that Politifact's pronouncements have to be taken with a grain of salt. The claim that the Republicans aren't trying to do away with Medicare is so blatantly false on its face that we give Politifact a "pants on fire" rating for calling this the "Lie of the Year."