I figure that it's just something trivial, but politically-damaging.
'Twould be hard to run as "The First Black President" if your BC lists your race as "Caucasian", for example. Would need to be something that would cost him votes, en masse.
Just my opinion. YMMV.
I think it might well be something considerably less trivial, like that Frank Marshall Davis is the father, and not BHO Sr. Which would blow the whole Dreams from my Father narrative.
Mind you I’m not saying I think *that* is what is being hidden. Just that it could very well be something that non-trivial.
I just figured his original BC on file in Hawaii was “corrected” or replaced (because of the adoption). On top of that he never changed his name back. Is there a law against that ?