CENTURION, South Africa — President Barack Obama is receiving the embrace you might expect for a long-lost son on his return to his father's home continent, even as he has yet to leave a lasting policy legacy for Africa on the scale of his two predecessors. Presidents Bill Clinton and George W. Bush passed innovative Africa initiatives while in the White House and continue their development work in the region in their presidential afterlife. Obama's efforts have not been so ambitious, despite his personal ties to the continent. His first major tour of Africa as president is coming just now, in his fifth year, while Bush and Clinton are frequent fliers to Africa. Bush will be in Dar es...
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