Tim Cook must pull off a careful balancing act to protect Apple's supply chain empire in China

Tim Cook faces a tough balancing act between Washington and Beijing to protect Apple's supply chain in China.

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• For years, Tim Cook has overseen the development of Apple's supply chain in China.
• The risk of tariffs on China from Donald Trump requires a complex balancing act from Cook.
• Jamie MacEwan, an analyst, estimates that "almost half of Apple's revenue is exposed to China."

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