the central problem with this meme is that it's meaningless. unless what is meant by it is "buy from small-to-medium sized firms that do not operate on a version of just-in-time and which do not trade publically"---in which case there'd no be much in the way of consternation about effects--it means nothing.
for example, if you look at the GENERAL NOTES; GENERAL RULES OF INTERPRETATION to the us tarrif:
Harmonized Tariff Schedule of the United States
and try to figure out what exactly is and is not an import, it gets a little squirrely...
this link
http://www.intracen.org/tfs/docs/pub...s/ruleori2.pdf
takes you to a piece that tries to systematize various legal definitions of country of origin.
you'd think this would be simple.