Would that really be a bad thing?
Well, for one, we'd have to invite the rest of Latin America, at least those from Guatemala to Panama who still make up part of North America. Or would they be like Turkey with the EU, part of Europe but still stuck in the minors until they can get the kinks out of their swing?
I, for one, would welcome the Amero with open arms (provided they come up with a better name, the Namo, the Northie, the Sacagawea?). Let's face it, the Almighty Dollar isn't what it once was. Perhaps if we unite with the economic superpowers to our North and South, the United States could see economic growth in the next few decades.