Someone has a site with many photos from various angles. They could be brothers. Actually a lot of close relatives don’t even look that similar. It’s completely uncanny.
Here's my take on the birth certificate, FWIW. (Since I read this whole thread... and smoked a pack of cigarettes as a result... I figure I should at least put in a little something I got from it... other than high blood pressure.)
It seems feasible to me that Hawaii [at that time] would be a place that a person could go to have a child if "records" were an issue. I am stunned at the Dunham's history. Not knowing who Obama is... seems to be his life story.