US corporations (for example, Tara Gold and Golden Minerals, Inc.) are mining resources in Mexico right now. American corporate interests are extracting resources worldwide for a profit and have been for decades. The thought that we can be rude to and shut out other countries and there will be no repercussions for our own corporations is extremely naive and unsophisticated.  Global manufacturing and trade are facts of life, and have been so for centuries.  "America first" is just a slogan, not a realistic approach.