The Talking Points Memo blog notes here that Delaware Republican Senate nominee Christine O'Donnell, warning about the dangers of stem cell research, disapprovingly claimed that, yes, scientists have created mice with "fully functioning human brains"! (This was in 2007. TPM suspects she was incorrectly referring to this 2005 report about growing cells in mice.)
You might think revelations like this of just a few years ago might damage the credibility of the Republican nominee for one of Delaware's two seats in the US Senate. O'Donnell's response? Voters, please forget my past!
Of course, if we forget the parts of her past she wants us to forget, then we may need to be told more about about what is left.