When President Obama and the first lady travel to Africa at the end of this month, they will receive a rapturous greeting. The president’s deep roots in Kenya, the land of his father, resonate throughout the continent. His success in the United States evokes pride and joy in Africa. I write this from Nigeria, a country that has just celebrated its 14th year of democracy. President Obama’s election enabled Africans to see America in a new light. I hope his visit will enable Americans to see Africa with new eyes. We know the problems of Africa: its poverty, corruption and …