http://www.boston.com/news/politics/2008/articles/2008/09/21/a_fathers_charm_absence/
SEE FINAL PARAGRAPH PAGE 4.
During his time at Harvard, Obama met another woman. Her name was Ruth Nidesand, a teacher and a person of some means. Obama confided in friends that he was attracted to Nidesand in part because, "she was able to pay for some of the social activities that he could not afford," said Omolo. Obama had continued to write Dunham in Hawaii and inquire about their son, but relations between the two deteriorated and they divorced in 1964. The following year, Obama returned to Africa with Nidesand and the couple were soon married.
Note -- the couple was married IN AFRICA. Part of a pattern? Does this mean that perhaps our conjecture is right and that there was a family, or tribal, reason to be married in Africa, other than it was the only place they could do so legally?
While Obama may have been open to living with multiple spouses, his new wife was not. Obama's first wife, Kezia Obama, had long waited for her husband's return, according to several of his friends. But Nidesand refused to share a home with her and Obama's two children from his first marriage. Instead, the children, Auma and Roy, moved in with their father according to Obama's book. Obama continued to visit Kezia however, and in the coming years he fathered four more sons, two with Nidesand, and two with Kezia. The children, one of whom died in a motorcycle accident, are scattered around the world.
I don't believe that I have ever seen pictures of his 2 children with Ruth. Certainly, all the pictures I have ever seen of Obama Sr's many children none resembled BO, nor did any of them look like they had a drop of white genetics -- other than BO.