It’s a cost to Americans only if it affects the end cost the consumer in America pays.
Some products have to priced based on their competition.
You can add 6000 in border tax to a 30,000 auto, but that doesn’t mean consumers will choose the 36,000 auto over the 30,000 one.
Unquestionably true.
It also means that you then may not have that $6000 to pay for the wall.