Of course there is the problem that "the stuff" that those regions manufacture is junk that falls apart in a year, which means that you have to buy it over and over; the actual cost is much higher. This is outside the fact we have no manufacturing base left, and no longer make anything of value except financial transactions- which are themselves of no value at all.
Unfortunately, I suspect that when seeing the name David Ricardo, most people wonder on which season of American Idol he appeared.
Seriously, one of the main areas of opposition to the idea of free trade, in my opinion, is that the Univerisity of Chicago has historically been a major proponent of free trade, and the east coast is never going to go along with anything that comes out of the Midwest.
Good - let the other countries make the stuff that doesn't take any skill to make. We'll buy it from them cheaper than it would cost if we made it here, and they'll have more money to buy the stuff from us that they can't produce. Free trade - the rising tide that lifts all boats (if you don't understand how this works, enroll in an introductory economics class at your local community college)