You mean the problem that sales tax is applied on inputs in the US sometimes? How do you know Ford is affected by this and hasn't structured their supply chains in a way to avoid this problem?

As mentioned in the article this is a domestic problem as well in inter-state commerce. I would also be worried that it distorts supply chains.

Tariffs are not a temporary fix for this either, since the USD will just appreciate and perhaps we'll put counter-tariffs on your tariffs. You'll need to fix this problem on your side.