Well there are several cases on this but the most famous are Berg v. Obama (www.obamacrimes.com) and Keyes v. Bowden.
I know the url for Berg seems biased but he is a Democrat and ACLU member, believe it or not.
I have read that according to numerous photographic experts, the factcheck version of the bc is a fraud. Links to various youtube article:
http://www.youtube.com/watch?v=SIsQJNTvlUE