US President Donald Trump’s fondness for Tim Cook is souring. He took several jabs at Apple’s chief executive during his recent tour of the Middle East, likely stemming from his resistance to shifting iPhone production out of China.

The extra tariff added to all iPhones imported in the US may not have been about bringing manufacturing back to the US, but specifically to reprimand Tim Cook for skipping a Trump event.

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