The latest evidence that Washington needs a new Africa policy is on display in Niger. After many months of intense political jockeying, the United States’ security partnership with the country looks likely to end. Following a recent visit by Molly Phee, the U.S. assistant secretary of state for African affairs, and Gen. Michael Langley, the chief of the U.S. Africa Command, the Nigerien junta abruptly declared more than a decade of training and operational partnership to be over.