Comment by alkonaut

In the first scenario the investment isn't astronomical, and if there is surplus capacity you can definitely shift around to avoid tariffs. I think Volvo already announced this wrt. to their US plants. They can take some production from the EU or China and use capacity in the US to build cars. The parts are still imported from China and the EU so will be more expensive, but they still seem to think this can help.

But the second scenario is a massive investment. It not only requires the economics of it to work today, it requires knowing what the situation is 1 or 2 decades down the line. You can't build a car factory in two years. Barely in four. And even if you do, it doesn't matter if it's likely to operate at a loss in 8 years!

The most important thing for that type of investment is stability and predictability, not just "the costs will be lower for at least 2 years now! or maybe 2weeks we don't know since the tariffs seem to come and go depending on which side of bed the local czar wakes up on".