A series of shifting and often contradictory tariff policies have left a mess in their wake. Will Trump actually stick to this threat?

Apple Inc. (NASDAQ:AAPL) is reportedly pushing forward with a major supply chain expansion in India through its top manufacturing partner, Foxconn, also known as Hon Hai Precision Industry Co. Ltd. (OTC:HNHAF).

"If that is not the case, a tariff of at least 25% must be paid by Apple to the US."Adding uncertainty to his ultimatum, Trump later said the tariff wouldn't apply to just the iPhone but also to any smartphone made outside the US.