It is all good politics even if it is economic suicide and outright stupid. That has not stopped the political pitch ever.
I always like to share the imagined markups on the proverbial tee shirt, selling cost say $10.00.
$1.00 to commission salesman.
$1.00 to house margin
$4.00 to sales discounts used to move product as it ages..
$2.50 wholesalers margin to pay for importing risk and all that.
$2.00 taxes and tariffs.
$0.50 to Chinese manufacturer to pay workers at $0.25
This is not one hundred percent correct but i went through numbers that were real a few times and this is not off the mark. My point is that anywhere from 85% to 95% is spent onshore for most commodity type products not demanding serious labor inputs.
Thus the political case though almost convincing is nothing of the sort.