Thank you for these four links. I couldn't read the fourth one because of technical issues. I did read the first three.
Of the first three, only the third had any mention of Kenya. To my understanding, the article stated that Muslims enslaved the Kenyan people. Those slaves were not bought to America. I had read that most slaves bought to America came from Central and West Africa. Kenya is in East Africa.
So, Barack Obama's ancestors couldn't have been the slave traders who sent slaves to America. We'll have to tell Dawg that.