WASHINGTON, March 31 (Reuters) – Nigerian opposition candidate Muhammadu Buhari, who appears to have defeated President Goodluck Jonathan in Nigeria’s weekend election, won a cautious endorsement from a U.S. official on Tuesday.

Source: http://feeds.reuters.com/~r/reuters/AfricaNigeriaNews/~3/PMU3lEOQzTM/idAFL2N0WX1IP20150331