It's actually fairly common to reuse old props in movies and TV shows. Take the mask of Michael Myers in Halloween. It's actually an old mask of William Shatner painted white. Most often people don't notice or care, so they get away with these things.
EDIT: I honestly don't know if it was meant to be a political statement or not, but the excuse is plausible.
You can't really tell that it is him, anyways.Edited by Jr Mouse - 6/14/12 at 1:22pm