I remember news reports about flyers circulating in heavily Democrat-populated areas giving these wrong instructions about when to vote.
The fake flyers were also discouraging people who had traffic tickets or family members who were felons, and a variety of other things like that.
The Onion did run a satire piece where they posted a picture of a fake billboard telling Democrats to vote on Wednesday.
But Kerry was referring to the flyers that were found circulating, not the Onion article information.
I think the Onion and Jay Leno and a few others did gags about this story after the flyers were made public.
But Kerry was apparently referring to the source material, not the comedy routines that were borne out of the source material