I don't think saying "Bush hid in the National Guard" is an example of Liberals letting go of the issue either and we [ Republicans ] have certainly heard enough of that also.

While to be fair, I have also heard enough of Kerry's Viet Nam record but it he himself that seems to preface every sentence with " When I was In Viet Nam"
Why doesn't he discuss his 20 years of government service. Perhaps it's because there is nothing there.
I think the issue here is not only his credibility but whether he is telling the truth.
John Kerry IMHO would NOT make a strong president. His votes and positions against the military alone bear this out.