Kind of like Shakespeare's monkeys. If you tell enough lies about a conservative, eventually someone will forge a document which seems to support some of them. I don't think there is a specific connection here.
I'm sure there will be other forgeries as well...things like a memo from the State department telling the White house that there are no WMD's in Iraq, but they are getting pressure from Rumsfeld to keep quiet about it...or transcripts of a meeting between Cheney and lumber companies where he agrees to secretly sell them all the lumber in all the national forests but only if they promised to clear cut it all and pave afterward.
Remember who we're dealing with here.
Are you suggesting there is a vast left wing conspiracy? :)