WHAT HAPPENED TO THE "VOTER FRAUD" WHINE?

I half expected the radio gasbags and their allies to try to stir up more trouble by falsely claiming that Pres. Obama's victory was due to voter fraud. So far, I've only heard a couple of talk show callers mention this fantasy and of course, there's always Joseph Farah. Does this mean there is an upper limit to the BS these guys will try to sell?