That was the stated goal for bringing steel production back to the USA at least, not sure about the imputed goals of other manufacturing jobs, but it should follow a similar line of thought, redundancy of critical-supply-chain parts.
No, that was a jobs play. Steel is well diversified, and we get our steel from a variety of largely trusted producers. The largest import source of steel was Canada. We also produce and export a lot of steel.
Steel is important but it’s not similar at all to something like Taiwan’s unique situation