Why China’s footprint in Africa worries the US

Secretary of State Rex Tillerson set out this week for his first trip to sub-Saharan Africa, where he is holding meetings with influential leaders across the continent. Yet even as the US seeks to shore up (和, 在某种意义上，, repair) its relationships with African governments, Tillerson is keenly aware of another, bigger presence looming in the background…阅读更多