That would certainly not surprise me, but bear in mind that almost all librarians/archivists (who are, after all, in a quasi-academic discipline) are raving left-wing Dems. I suspect that this is probably doubly so in the case of those who work for the government.
Here's a little more info on the National Archives, for your reading pleasure:
http://www.freerepublic.com/focus/f-news/1177171/posts
You have a point. One would think they would be HONEST, at least, but I realize that is probably a vain hope.
bttt