"If that is not the case, a Tariff of at least 25% must be paid by Apple to the U.S.," Trump wrote on Truth Social on Friday.

Apple has traditionally produced its devices in China, in massive factories that rely on a vast network of local suppliers.

President Donald Trump reignited trade tensions ahead of the Memorial Day weekend with back-to-back social media posts targeting Apple and the European Union, sending global markets into turmoil after...