While still frustrating, finding American-made Christmas presents gets slightly easier when I branch out from children's clothes to children's toys. Slightly.
Turns out classic toys like the Slinky and Silly Putty are still made in America. America still makes your basic deck of cards. Certain I Spy and Doctor Suess books were produced here. And organic Play Clay and assorted activity kits can be found here.
For a list that includes wooden blocks, plastic trucks, fairy costumes, stuffed toys etc, check this out: http://toysmadeinamerica.com/
I can afford to spend weeks searching for a single gift for a child that was produced in America. Somehow, I doubt that many middle/working class parents have the time, energy, or extra cash. I suppose that's why the Walmart parking lot is always full.