President Obama's father was abusive, alcoholic and violent – but still brilliant, the president's half-brother, Mark Obama Ndesandjo, said in his memoirs and on a recent television broadcast.
"I mentioned in my book that I felt that he thought that I was too white and I felt he was too black," he said. "He had been raised in white America and I think he was looking for his African roots as a cultural journey. ... I wanted to explore my western roots. I felt at that point, we had different points of view."