I'm pretty sure there was a time in politics where people at least attempted, to some small degree, to have their claims at least remotely line up with reality and with their previous comments. This is no longer true of the modern GOP. For any documented negative consequence of their policies, they will simply spend millions of dollars on ads accusing the Democrats of doing the same thing in hopes of muddying the waters enough that low-information voters will simply shrug their shoulders and look for other reasons to vote for one candidate over the other.
Todd Akin has now taken this strategy to a new low. Despite the fact that he claims that Medicare is unconstitutional, he's up with new advertisements, he's up with a new ad claiming that he's fighting to "protect and strengthen Medicare" and claiming that Senator McCaskill is trying to weaken it. It's the absolute height of cynicism, and shows clearly how little Akin thinks of voters.
On the other hand, Akin at least stood by his comments that offering students loans to go to college is "stage 3 cancer of socialism," saying he was "calling a spade a spade." But of course, in GOP minds, his standing by this comment now doesn't really matter at all. If they decide this is a bad issue for them, they'll just drop a few million on ads next week claiming that "Akin is working hard to protect student loans, while Claire McCaskill destroys them." They think Missouri voters are too stupid to know the facts. I hope we prove them wrong.