I guess it only took him 16 years to realize the mistake.
Evidently, the original coverage of the story came from the Breitbart web site and they stating that they don’t actually believe that Obama was born in Kenya, but that they published the story to illustrate the fact that Obama changes his public persona at will. In other words, he deceives people about who he is and he presented himself as a cosmopolitan Black man for so many years that it finally came back to bite him in the 2008 election campaign.
The idea behind publishing the bio was to point out that if he lied about his birth place, what else does he lie about? Where are those college grades? Who were his friends? Who is he, really?